diff --git a/NEWS.md b/NEWS.md
index 99ca84cb8b3..6408a29742c 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -937,7 +937,7 @@ For a more comprehensive changelog of the latest experimental code, see:
 
  SCUMM:
    - Fixed missing translations in the in-game quit and restart dialogs in Pajama Sam 1.
-   - Fixed visual glitches in DOTT that occured after loading a savegame with the stereo
+   - Fixed visual glitches in DOTT that occurred after loading a savegame with the stereo
      in Green Tentacle's room turned on.
    - Improved timing and pathfinding in Maniac Mansion (C64 and Apple II versions).
    - Added support for the Dutch demo of Let's Explore the Airport with Buzzy.
@@ -968,7 +968,7 @@ For a more comprehensive changelog of the latest experimental code, see:
  General:
    - Removed TESTING flag from several supported games.
    - Added Chinese Pinyin translation.
-   - Fixed cursor stuttering in the launcher that occured on some systems.
+   - Fixed cursor stuttering in the launcher that occurred on some systems.
 
  BBVS:
    - Fixed game restart.
diff --git a/audio/decoders/asf.h b/audio/decoders/asf.h
index b1867611065..abc1a0eb013 100644
--- a/audio/decoders/asf.h
+++ b/audio/decoders/asf.h
@@ -34,7 +34,7 @@ namespace Audio {
  * @param stream          The SeekableReadStream from which to read the ASF data.
  * @param disposeAfterUse Whether to delete the stream after use.
  *
- * @return A new SeekableAudioStream, or 0, if an error occured.
+ * @return A new SeekableAudioStream, or 0, if an error occurred.
  */
 
 SeekableAudioStream *makeASFStream(
diff --git a/backends/cloud/box/boxstorage.h b/backends/cloud/box/boxstorage.h
index 1916c884498..7b720e477bb 100644
--- a/backends/cloud/box/boxstorage.h
+++ b/backends/cloud/box/boxstorage.h
@@ -100,7 +100,7 @@ public:
 
 	/**
 	 * Load token and user id from configs and return BoxStorage for those.
-	 * @return pointer to the newly created BoxStorage or 0 if some problem occured.
+	 * @return pointer to the newly created BoxStorage or 0 if some problem occurred.
 	 */
 	static BoxStorage *loadFromConfig(Common::String keyPrefix);
 
diff --git a/backends/cloud/dropbox/dropboxstorage.h b/backends/cloud/dropbox/dropboxstorage.h
index bf007ebad66..6c421ce70c7 100644
--- a/backends/cloud/dropbox/dropboxstorage.h
+++ b/backends/cloud/dropbox/dropboxstorage.h
@@ -95,7 +95,7 @@ public:
 
 	/**
 	 * Load token and user id from configs and return DropboxStorage for those.
-	 * @return pointer to the newly created DropboxStorage or 0 if some problem occured.
+	 * @return pointer to the newly created DropboxStorage or 0 if some problem occurred.
 	 */
 	static DropboxStorage *loadFromConfig(Common::String keyPrefix);
 
diff --git a/backends/cloud/googledrive/googledrivestorage.h b/backends/cloud/googledrive/googledrivestorage.h
index 792c30a99fd..65b5166ce82 100644
--- a/backends/cloud/googledrive/googledrivestorage.h
+++ b/backends/cloud/googledrive/googledrivestorage.h
@@ -102,7 +102,7 @@ public:
 
 	/**
 	 * Load token and user id from configs and return GoogleDriveStorage for those.
-	 * @return pointer to the newly created GoogleDriveStorage or 0 if some problem occured.
+	 * @return pointer to the newly created GoogleDriveStorage or 0 if some problem occurred.
 	 */
 	static GoogleDriveStorage *loadFromConfig(Common::String keyPrefix);
 
diff --git a/backends/cloud/onedrive/onedrivestorage.h b/backends/cloud/onedrive/onedrivestorage.h
index edf6a5f53f3..a3d9f1d7743 100644
--- a/backends/cloud/onedrive/onedrivestorage.h
+++ b/backends/cloud/onedrive/onedrivestorage.h
@@ -99,7 +99,7 @@ public:
 
 	/**
 	 * Load token and user id from configs and return OneDriveStorage for those.
-	 * @return pointer to the newly created OneDriveStorage or 0 if some problem occured.
+	 * @return pointer to the newly created OneDriveStorage or 0 if some problem occurred.
 	 */
 	static OneDriveStorage *loadFromConfig(Common::String keyPrefix);
 
diff --git a/backends/graphics/opengl/texture.cpp b/backends/graphics/opengl/texture.cpp
index 2cdaf92f371..c3ed85fc619 100644
--- a/backends/graphics/opengl/texture.cpp
+++ b/backends/graphics/opengl/texture.cpp
@@ -146,7 +146,7 @@ void GLTexture::updateArea(const Common::Rect &area, const Graphics::Surface &sr
 
 	// Update the actual texture.
 	// Although we have the area of the texture buffer we want to update we
-	// cannot take advantage of the left/right boundries here because it is
+	// cannot take advantage of the left/right boundaries here because it is
 	// not possible to specify a pitch to glTexSubImage2D. To be precise, with
 	// plain OpenGL we could set GL_UNPACK_ROW_LENGTH to achieve this. However,
 	// OpenGL ES 1.0 does not support GL_UNPACK_ROW_LENGTH. Thus, we are left
diff --git a/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp b/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp
index d5c034f3299..1a2d5232c66 100644
--- a/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp
+++ b/backends/graphics3d/openglsdl/openglsdl-graphics3d.cpp
@@ -406,7 +406,7 @@ bool OpenGLSdlGraphics3dManager::createOrUpdateGLContext(uint gameWidth, uint ga
 	pixelFormats.push_back(OpenGLPixelFormat(16, 5, 5, 5, 1, 0));
 	pixelFormats.push_back(OpenGLPixelFormat(16, 5, 6, 5, 0, 0));
 
-	// Unfortunatly, SDL does not provide a list of valid pixel formats
+	// Unfortunately, SDL does not provide a list of valid pixel formats
 	// for the current OpenGL implementation and hardware.
 	// SDL may not be able to create a screen with the preferred pixel format.
 	// Try all the pixel formats in the list until SDL returns a valid screen.
diff --git a/backends/platform/gph/gph-backend.cpp b/backends/platform/gph/gph-backend.cpp
index 729c7e05c00..d9b686aa7ec 100644
--- a/backends/platform/gph/gph-backend.cpp
+++ b/backends/platform/gph/gph-backend.cpp
@@ -121,7 +121,7 @@ void OSystem_GPH::initBackend() {
 	/* Set Default hardware mixer volume to a preset level (VOLUME_INITIAL). This is done to 'reset' volume level if set by other apps. */
 	WIZ_HW::mixerMoveVolume(0);
 
-	/* Up default volume values as we use a seperate system level volume anyway. */
+	/* Up default volume values as we use a separate system level volume anyway. */
 	ConfMan.registerDefault("music_volume", 192);
 	ConfMan.registerDefault("sfx_volume", 192);
 	ConfMan.registerDefault("speech_volume", 192);
diff --git a/common/archive.h b/common/archive.h
index 2f06c678283..02f5a81fbe3 100644
--- a/common/archive.h
+++ b/common/archive.h
@@ -192,7 +192,7 @@ public:
 	 * Create and add a subdirectory by name (caseless).
 	 *
 	 * It is also possible to add subdirectories of subdirectories (of any depth) with this function.
-	 * The path seperator for this case is SLASH for all systems.
+	 * The path separator for this case is SLASH for all systems.
 	 *
 	 * Example:
 	 *
@@ -216,7 +216,7 @@ public:
 	 * Create and add subdirectories by pattern.
 	 *
 	 * It is also possible to add subdirectories of subdirectories (of any depth) with this function.
-	 * The path seperator for this case is SLASH for all systems.
+	 * The path separator for this case is SLASH for all systems.
 	 *
 	 * Example:
 	 *
diff --git a/dists/androidsdl/scummvm/AndroidAppSettings.cfg.in b/dists/androidsdl/scummvm/AndroidAppSettings.cfg.in
index 347846383f3..46de862b3ce 100644
--- a/dists/androidsdl/scummvm/AndroidAppSettings.cfg.in
+++ b/dists/androidsdl/scummvm/AndroidAppSettings.cfg.in
@@ -116,7 +116,7 @@ AppRecordsAudio=n
 
 # Application implements Android-specific routines to put to background, and will not draw anything to screen
 # between SDL_ACTIVEEVENT lost / gained notifications - you should check for them
-# rigth after SDL_Flip(), if (n) then SDL_Flip() will block till app in background (y) or (n)
+# right after SDL_Flip(), if (n) then SDL_Flip() will block till app in background (y) or (n)
 # This option is reported to be buggy, sometimes failing to restore video state
 NonBlockingSwapBuffers=n
 
diff --git a/dists/engine-data/create-playground3d-data.sh b/dists/engine-data/create-playground3d-data.sh
index e0c737ffb55..be3ae817363 100755
--- a/dists/engine-data/create-playground3d-data.sh
+++ b/dists/engine-data/create-playground3d-data.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # Create the directory structure
-# Avoided bash shortcuts / file-seperators in interest of portability
+# Avoided bash shortcuts / file-separators in interest of portability
 
 if [ -e playground3d ]; then
 	echo "Game-data already present as playground3d/"
diff --git a/dists/engine-data/create-testbed-data.sh b/dists/engine-data/create-testbed-data.sh
index 754ec4d6839..c9ce69ce163 100755
--- a/dists/engine-data/create-testbed-data.sh
+++ b/dists/engine-data/create-testbed-data.sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 # Create the directory structure
-# Avoided bash shortcuts / file-seperators in interest of portability
+# Avoided bash shortcuts / file-separators in interest of portability
 
 if [ -e testbed ]; then
 	echo "Game-data already present as testbed/"
diff --git a/engines/agi/module.mk b/engines/agi/module.mk
index d66e4129de8..75e3721a33c 100644
--- a/engines/agi/module.mk
+++ b/engines/agi/module.mk
@@ -55,5 +55,5 @@ DETECT_OBJS += $(MODULE)/detection.o
 
 # External dependencies of detection.
 # This is unneeded by the engine module itself,
-# so seperate it completely.
+# so separate it completely.
 DETECT_OBJS += $(MODULE)/wagparser.o
diff --git a/engines/agi/saveload.cpp b/engines/agi/saveload.cpp
index 97039b8944b..8c14bb573ba 100644
--- a/engines/agi/saveload.cpp
+++ b/engines/agi/saveload.cpp
@@ -976,7 +976,7 @@ bool AgiEngine::loadGameDialog() {
 // If we fail, return false, so that the regular saved game dialog is called
 // Original AGI was limited to 12 saves, we are effectively limited to 100 saves at the moment.
 //
-// btw. this also means that entering an existant name in Mixed Up Mother Goose will effectively overwrite
+// btw. this also means that entering an existent name in Mixed Up Mother Goose will effectively overwrite
 // that saved game. This is also what original AGI did.
 bool AgiEngine::saveGameAutomatic() {
 	int16 automaticSaveGameSlotId = 0;
diff --git a/engines/agi/systemui.cpp b/engines/agi/systemui.cpp
index 0eb54752b9f..73596e7c7b9 100644
--- a/engines/agi/systemui.cpp
+++ b/engines/agi/systemui.cpp
@@ -286,7 +286,7 @@ int16 SystemUI::figureOutAutomaticSaveGameSlot(const char *automaticSaveDescript
 
 	// Walk through saved game slots
 	// check, if description matches and return the slot
-	// if no match can be found, return the first non-existant slot
+	// if no match can be found, return the first non-existent slot
 	// if all slots exist, return -1
 	figureOutAutomaticSavedGameSlot(automaticSaveDescription, matchedGameSlotId, freshGameSlotId);
 
@@ -294,7 +294,7 @@ int16 SystemUI::figureOutAutomaticSaveGameSlot(const char *automaticSaveDescript
 		return matchedGameSlotId; // return matched slot
 
 	if (freshGameSlotId >= 0)
-		return freshGameSlotId; // return first non-existant slot
+		return freshGameSlotId; // return first non-existent slot
 
 	return -1; // no slots exist, not match found
 }
@@ -304,7 +304,7 @@ int16 SystemUI::figureOutAutomaticRestoreGameSlot(const char *automaticSaveDescr
 	int16 freshGameSlotId   = -1;
 
 	// Fill saved game slot cache
-	readSavedGameSlots(true, false); // filter non-existant/invalid saves, also don't include auto-save slot
+	readSavedGameSlots(true, false); // filter non-existent/invalid saves, also don't include auto-save slot
 
 	// Walk through saved game slots
 	// check, if description matches and return the slot. Otherwise return -1
diff --git a/engines/agi/view.cpp b/engines/agi/view.cpp
index 69bde8479ef..ef1410543f0 100644
--- a/engines/agi/view.cpp
+++ b/engines/agi/view.cpp
@@ -481,7 +481,7 @@ void AgiEngine::setLoop(ScreenObjEntry *screenObj, int16 loopNr) {
 	}
 
 	if (loopNr >= screenObj->loopCount) {
-		// requested loop not existant
+		// requested loop not existent
 		// instead of error()ing out, we instead clip it
 		// At least required for possibly Manhunter 1 according to previous comment when leaving the arcade machine
 		// TODO: Check MH1
@@ -493,7 +493,7 @@ void AgiEngine::setLoop(ScreenObjEntry *screenObj, int16 loopNr) {
 
 		loopNr = screenObj->loopCount - 1;
 
-		warning("Non-existant loop requested for screen object %d", screenObj->objectNr);
+		warning("Non-existent loop requested for screen object %d", screenObj->objectNr);
 		warning("view %d, requested loop %d -> clipped to loop %d", screenObj->currentViewNr, requestedLoopNr, loopNr);
 	}
 
@@ -537,7 +537,7 @@ void AgiEngine::setCel(ScreenObjEntry *screenObj, int16 celNr) {
 	}
 
 	if (celNr >= screenObj->celCount) {
-		// requested cel not existant
+		// requested cel not existent
 		// instead of error()ing out, we instead clip it
 		// At least required for King's Quest 3 on Apple IIgs - walking the planks death cutscene
 		// see bug #5832, which is a game bug!
@@ -545,7 +545,7 @@ void AgiEngine::setCel(ScreenObjEntry *screenObj, int16 celNr) {
 
 		celNr = screenObj->celCount - 1;
 
-		warning("Non-existant cel requested for screen object %d", screenObj->objectNr);
+		warning("Non-existent cel requested for screen object %d", screenObj->objectNr);
 		warning("view %d, loop %d, requested cel %d -> clipped to cel %d", screenObj->currentViewNr, screenObj->currentLoopNr, requestedCelNr, celNr);
 	}
 
diff --git a/engines/ags/engine/ac/draw.cpp b/engines/ags/engine/ac/draw.cpp
index f85c813cf7a..97ed32d2cbf 100644
--- a/engines/ags/engine/ac/draw.cpp
+++ b/engines/ags/engine/ac/draw.cpp
@@ -1394,7 +1394,7 @@ int construct_object_gfx(int aa, int *drawnWidth, int *drawnHeight, bool alwaysU
 
 
 
-// This is only called from draw_screen_background, but it's seperated
+// This is only called from draw_screen_background, but it's separated
 // to help with profiling the program
 void prepare_objects_for_drawing() {
 	_G(our_eip) = 32;
@@ -1472,7 +1472,7 @@ void tint_image(Bitmap *ds, Bitmap *srcimg, int red, int grn, int blu, int light
 		return;
 	}
 
-	// For performance reasons, we have a seperate blender for
+	// For performance reasons, we have a separate blender for
 	// when light is being adjusted and when it is not.
 	// If luminance >= 250, then normal brightness, otherwise darken
 	if (luminance >= 250)
diff --git a/engines/ags/engine/ac/game.cpp b/engines/ags/engine/ac/game.cpp
index 6bcb3c14f15..3ef840de3a3 100644
--- a/engines/ags/engine/ac/game.cpp
+++ b/engines/ags/engine/ac/game.cpp
@@ -786,7 +786,7 @@ void serialize_bitmap(const Shared::Bitmap *thispic, Stream *out) {
 	}
 }
 
-// On Windows we could just use IIDFromString but this is _G(platform)-independant
+// On Windows we could just use IIDFromString but this is _G(platform)-independent
 void convert_guid_from_text_to_binary(const char *guidText, unsigned char *buffer) {
 	guidText++; // skip {
 	for (int bytesDone = 0; bytesDone < 16; bytesDone++) {
diff --git a/engines/ags/engine/ac/game.h b/engines/ags/engine/ac/game.h
index cc5373fefe9..f63258144ef 100644
--- a/engines/ags/engine/ac/game.h
+++ b/engines/ags/engine/ac/game.h
@@ -161,12 +161,12 @@ void unload_game_file();
 void save_game(int slotn, const char *descript);
 bool read_savedgame_description(const Shared::String &savedgame, Shared::String &description);
 bool read_savedgame_screenshot(const Shared::String &savedgame, int &want_shot);
-// Tries to restore saved game and displays an error on failure; if the error occured
+// Tries to restore saved game and displays an error on failure; if the error occurred
 // too late, when the game data was already overwritten, shuts engine down.
 bool try_restore_save(int slot);
 bool try_restore_save(const Shared::String &path, int slot);
 void serialize_bitmap(const Shared::Bitmap *thispic, Shared::Stream *out);
-// On Windows we could just use IIDFromString but this is platform-independant
+// On Windows we could just use IIDFromString but this is platform-independent
 void convert_guid_from_text_to_binary(const char *guidText, unsigned char *buffer);
 Shared::Bitmap *read_serialized_bitmap(Shared::Stream *in);
 void skip_serialized_bitmap(Shared::Stream *in);
diff --git a/engines/ags/engine/ac/object.cpp b/engines/ags/engine/ac/object.cpp
index 938d40298b0..3a3213ee529 100644
--- a/engines/ags/engine/ac/object.cpp
+++ b/engines/ags/engine/ac/object.cpp
@@ -305,7 +305,7 @@ void Object_Move(ScriptObject *objj, int x, int y, int speed, int blocking, int
 	if ((blocking == BLOCKING) || (blocking == 1))
 		GameLoopUntilNotMoving(&_G(objs)[objj->id].moving);
 	else if ((blocking != IN_BACKGROUND) && (blocking != 0))
-		quit("Object.Move: invalid BLOCKING paramter");
+		quit("Object.Move: invalid BLOCKING parameter");
 }
 
 void Object_SetClickable(ScriptObject *objj, int clik) {
diff --git a/engines/ags/engine/game/savegame.cpp b/engines/ags/engine/game/savegame.cpp
index 83e4a0e132d..021f6ec660c 100644
--- a/engines/ags/engine/game/savegame.cpp
+++ b/engines/ags/engine/game/savegame.cpp
@@ -668,7 +668,7 @@ HSaveError RestoreGameState(Stream *in, SavegameVersion svg_version) {
 
 
 void WriteSaveImage(Stream *out, const Bitmap *screenshot) {
-	// store the screenshot at the start to make it easily accesible
+	// store the screenshot at the start to make it easily accessible
 	out->WriteInt32((screenshot == nullptr) ? 0 : 1);
 
 	if (screenshot)
diff --git a/engines/ags/shared/ac/sprite_cache.cpp b/engines/ags/shared/ac/sprite_cache.cpp
index b4a944de562..b77caa5fb5a 100644
--- a/engines/ags/shared/ac/sprite_cache.cpp
+++ b/engines/ags/shared/ac/sprite_cache.cpp
@@ -869,7 +869,7 @@ HAGSError SpriteFile::OpenFile(const String &filename, const String &sprindex_fi
 	buff[13] = 0;
 	if (strcmp(buff, spriteFileSig)) {
 		_stream.reset();
-		return new Error("Uknown spriteset format.");
+		return new Error("Unknown spriteset format.");
 	}
 
 	if (vers == kSprfVersion_Uncompressed) {
diff --git a/engines/ags/shared/util/file_stream.cpp b/engines/ags/shared/util/file_stream.cpp
index 562cea90647..67236989847 100644
--- a/engines/ags/shared/util/file_stream.cpp
+++ b/engines/ags/shared/util/file_stream.cpp
@@ -217,7 +217,7 @@ Common::OutSaveFile *FileStream::openForWriting(const String &saveName, FileOpen
 	if (work_mode == kFile_Read || work_mode == kFile_ReadWrite)
 		// In the original these modes result in [aw]+b, which seems to result
 		// in a file with arbitrary reading, but writing always appending
-		warning("FileOpen: independant read/write positions not supported");
+		warning("FileOpen: independent read/write positions not supported");
 
 	Common::InSaveFile *existing = nullptr;
 	if (open_mode == kFile_Create &&
diff --git a/engines/ags/shared/util/string.h b/engines/ags/shared/util/string.h
index b6d206fa0ea..b15bbfd4783 100644
--- a/engines/ags/shared/util/string.h
+++ b/engines/ags/shared/util/string.h
@@ -332,9 +332,9 @@ public:
 	}
 	// Prepends a single character
 	void    PrependChar(char c);
-	// Replaces all occurences of one character with another character
+	// Replaces all occurrences of one character with another character
 	void    Replace(char what, char with);
-	// Replaces all occurences of one substring with another substring
+	// Replaces all occurrences of one substring with another substring
 	void    Replace(const String &what, const String &with);
 	void    Replace(const char *what, const char *with) {
 		String whats = String::Wrapper(what), withs = String::Wrapper(with); Replace(whats, withs);
diff --git a/engines/avalanche/avalot.cpp b/engines/avalanche/avalot.cpp
index c8ef4bb0ac3..b10465d849c 100644
--- a/engines/avalanche/avalot.cpp
+++ b/engines/avalanche/avalot.cpp
@@ -1290,7 +1290,7 @@ void AvalancheEngine::gameOver() {
 void AvalancheEngine::minorRedraw() {
 	fadeOut();
 
-	enterRoom(_room, 0); // Ped unknown or non-existant.
+	enterRoom(_room, 0); // Ped unknown or non-existent.
 
 	for (int i = 0; i < 3; i++)
 		_scoreToDisplay[i] = -1; // impossible digits
diff --git a/engines/bladerunner/bladerunner.cpp b/engines/bladerunner/bladerunner.cpp
index 2fed57b452f..648a3747d7a 100644
--- a/engines/bladerunner/bladerunner.cpp
+++ b/engines/bladerunner/bladerunner.cpp
@@ -272,7 +272,7 @@ Common::Error BladeRunnerEngine::loadGameState(int slot) {
 
 	setTotalPlayTime(header._playTime);
 	// this essentially does something similar with setTotalPlayTime
-	// reseting and updating Blade Runner's _pauseStart and offset before starting a loaded game
+	// resetting and updating Blade Runner's _pauseStart and offset before starting a loaded game
 	_time->resetPauseStart();
 
 	loadGame(*saveFile, header._version);
diff --git a/engines/bladerunner/debugger.cpp b/engines/bladerunner/debugger.cpp
index 780e2ebf93c..c695d3d3ba9 100644
--- a/engines/bladerunner/debugger.cpp
+++ b/engines/bladerunner/debugger.cpp
@@ -1238,7 +1238,7 @@ bool Debugger::cmdOverlay(int argc, const char **argv) {
 
 				_vm->_scene->_vqaPlayer = new VQAPlayer(_vm, &_vm->_surfaceBack, origVqaName);
 				if (!_vm->_scene->_vqaPlayer->open()) {
-					debugPrintf("Error: Could not open player while reseting\nto scene VQA named: %s!\n", (origVqaName + ".VQA").c_str());
+					debugPrintf("Error: Could not open player while resetting\nto scene VQA named: %s!\n", (origVqaName + ".VQA").c_str());
 					return true;
 				}
 				_vm->_scene->startDefaultLoop();
@@ -1323,7 +1323,7 @@ bool Debugger::cmdOverlay(int argc, const char **argv) {
 				// even if it's not already loaded for the scene (in _vm->_overlays->_videos)
 				int overlayVideoIdx = _vm->_overlays->play(overlayName, overlayAnimationId, loopForever, startNowFlag, 0);
 				if ( overlayVideoIdx == -1 ) {
-					debugPrintf("Could not load the overlay animation: %s in this scene. Try reseting overlays first to free up slots!\n", overlayName.c_str());
+					debugPrintf("Could not load the overlay animation: %s in this scene. Try resetting overlays first to free up slots!\n", overlayName.c_str());
 				} else {
 					debugPrintf("Loading overlay animation: %s...\n", overlayName.c_str());
 
diff --git a/engines/bladerunner/script/scene/dr02.cpp b/engines/bladerunner/script/scene/dr02.cpp
index 5a045e4c05b..134b9f19863 100644
--- a/engines/bladerunner/script/scene/dr02.cpp
+++ b/engines/bladerunner/script/scene/dr02.cpp
@@ -95,7 +95,7 @@ void SceneScriptDR02::SceneLoaded() {
 	Clickable_Object("V2CANPIPE02");
 	// there are two objects named "TRASH CAN WITH FIRE" in the scene (but not visible)
 	// and none of them have to be set clickable
-	// and also reseting them here would only reset one of them - and one remains as clickable
+	// and also resetting them here would only reset one of them - and one remains as clickable
 	Unclickable_Object("TRASH CAN WITH FIRE");
 	Unclickable_Object("U2 CHEWDOOR");
 	Unclickable_Object("MMTRASHCAN");
diff --git a/engines/cine/sound.cpp b/engines/cine/sound.cpp
index e76ac182b7b..edf02a81fee 100644
--- a/engines/cine/sound.cpp
+++ b/engines/cine/sound.cpp
@@ -1534,7 +1534,7 @@ void PaulaSound::sfxTimerCallback() {
 	} else {
 		_sfxTimer = 0;
 		// Possible TODO: The original only ever started sounds here. This
-		// should not be noticable though. So we do not do it for now.
+		// should not be noticeable though. So we do not do it for now.
 	}
 }
 
diff --git a/engines/cruise/vars.h b/engines/cruise/vars.h
index e7c687d5fb1..dd992977b60 100644
--- a/engines/cruise/vars.h
+++ b/engines/cruise/vars.h
@@ -266,7 +266,7 @@ extern int16 ctp_routes[20][10];	// path-finding line information
 /* ctp_routes:
 
    correct size would be: ctp_routes[routeCoordCount * 20 * 2]
-   array is seperate in 20 * 2 bytes slices.
+   array is separate in 20 * 2 bytes slices.
    first 2 bytes of the slice indicate how many coordinates/lines are following (lineCount)
    after that there are lineCount * 2 bytes following with indexes pointing on the routeCoords table
    the root x,y for the lines is the coordinate in the routeCoords array, which fits to the current slice
diff --git a/engines/director/cast.cpp b/engines/director/cast.cpp
index 87ccc10b525..95e3faf8d44 100644
--- a/engines/director/cast.cpp
+++ b/engines/director/cast.cpp
@@ -1092,7 +1092,7 @@ void Cast::loadLingoContext(Common::SeekableReadStreamEndian &stream) {
 			}
 		}
 	} else {
-		error("Cast::loadLingoContext: unsuported Director version (%d)", _version);
+		error("Cast::loadLingoContext: unsupported Director version (%d)", _version);
 	}
 }
 
diff --git a/engines/director/lingo/lingo-builtins.cpp b/engines/director/lingo/lingo-builtins.cpp
index 040fbc0fe5e..2be0e77371e 100644
--- a/engines/director/lingo/lingo-builtins.cpp
+++ b/engines/director/lingo/lingo-builtins.cpp
@@ -1085,7 +1085,7 @@ void LB::b_getNthFileNameInFolder(int nargs) {
 	if (d.exists()) {
 		Common::FSList f;
 		if (!d.getChildren(f, Common::FSNode::kListAll)) {
-			warning("Cannot acces directory %s", path.c_str());
+			warning("Cannot access directory %s", path.c_str());
 		} else {
 			if ((uint)fileNum < f.size()) {
 				// here, we sort all the fileNames
diff --git a/engines/dm/projexpl.h b/engines/dm/projexpl.h
index d7b598a9342..5a0d2096e4e 100644
--- a/engines/dm/projexpl.h
+++ b/engines/dm/projexpl.h
@@ -56,7 +56,7 @@ public:
 	void createProjectile(Thing thing, int16 mapX, int16 mapY, uint16 cell, Direction dir,
 							   byte kineticEnergy, byte attack, byte stepEnergy); // @ F0212_PROJECTILE_Create
 	bool hasProjectileImpactOccurred(int16 impactType, int16 mapXCombo, int16 mapYCombo,
-										  int16 cell, Thing projectileThing); // @ F0217_PROJECTILE_HasImpactOccured
+										  int16 cell, Thing projectileThing); // @ F0217_PROJECTILE_HasImpactOccurred
 	uint16 getProjectileImpactAttack(Projectile *projectile, Thing thing); // @ F0216_PROJECTILE_GetImpactAttack
 	void createExplosion(Thing explThing, uint16 attack, uint16 mapXCombo,
 							  uint16 mapYCombo, uint16 cell); // @ F0213_EXPLOSION_Create
diff --git a/engines/glk/agt/exec.cpp b/engines/glk/agt/exec.cpp
index 1eedede10c7..90583e3fa51 100644
--- a/engines/glk/agt/exec.cpp
+++ b/engines/glk/agt/exec.cpp
@@ -784,7 +784,7 @@ static char *match_string(char *ans, char *corr_ans, int n)
 static rbool check_answer(char *ans, long start, long size)
 /* qnum has already been fixed to start from 0 */
 /*   Master's edition answer checker. Master's edition answers can */
-/* be seperate by AND and OR characters. If there is one OR in the */
+/* be separate by AND and OR characters. If there is one OR in the */
 /* answer, all ANDs will also be treated as ORs */
 /*   Furthermore, AND-delimited strings must appear in the correct order */
 /* unless PURE_ANSWER is false */
diff --git a/engines/glk/agt/gamedata.cpp b/engines/glk/agt/gamedata.cpp
index 8601ab84b98..3627a30cea2 100644
--- a/engines/glk/agt/gamedata.cpp
+++ b/engines/glk/agt/gamedata.cpp
@@ -1244,7 +1244,7 @@ void sort_cmd(void) {
 	}
 
 	for (i = 0; i < TOTAL_VERB; i++)
-		if (verbptr[i] == last_cmd) /* No occurences of this verb */
+		if (verbptr[i] == last_cmd) /* No occurrences of this verb */
 			verbend[i] = last_cmd;
 		else verbend[i]++; /* Point *after* last occurance */
 
diff --git a/engines/glk/agt/interp.h b/engines/glk/agt/interp.h
index 73cd36552d4..2bb1c131b61 100644
--- a/engines/glk/agt/interp.h
+++ b/engines/glk/agt/interp.h
@@ -300,7 +300,7 @@ global short last_he, last_she, last_it, last_they;
 #define ALL_MARK (-ext_code[wall])
 
 #define D_END  50    /* Marks end of disambiguation list */
-#define D_AND  51    /* Used to seperate multiple objects during disambig */
+#define D_AND  51    /* Used to separate multiple objects during disambig */
 #define D_NOUN 0   /* Noun match */
 #define D_SYN 1    /* Adjective/synonym only match */
 #define D_ADJ 2    /* Adj only match */
diff --git a/engines/glk/agt/object.cpp b/engines/glk/agt/object.cpp
index ee26258264d..bc38354d66a 100644
--- a/engines/glk/agt/object.cpp
+++ b/engines/glk/agt/object.cpp
@@ -972,7 +972,7 @@ void setprop(int obj, int prop, long val) {
 	integer *paddr;
 
 	if (prop >= NUM_WPROP) {
-		writeln("GAME ERROR: Read-only or non-existant property.");
+		writeln("GAME ERROR: Read-only or non-existent property.");
 		return;
 	}
 
@@ -997,7 +997,7 @@ void setattr(int obj, int prop, rbool val) {
 	rbool *paddr;
 
 	if (prop >= NUM_WATTR && prop != 24) {
-		writeln("GAME ERROR: Read-only or non-existant attribute.");
+		writeln("GAME ERROR: Read-only or non-existent attribute.");
 		return;
 	}
 
diff --git a/engines/glk/agt/runverb.cpp b/engines/glk/agt/runverb.cpp
index e043a40f382..940547267c7 100644
--- a/engines/glk/agt/runverb.cpp
+++ b/engines/glk/agt/runverb.cpp
@@ -282,7 +282,7 @@ static void v_eat(int vc, parse_rec *nounrec) {
 
 	if (noun[dobj_ - first_noun].movable) it_destroy(dobj_);
 	if (noun[dobj_ - first_noun].poisonous) {
-		sysmsgd(129, "Unfortunatly, $n_pro$ $n_was$ poisonous.", nounrec);
+		sysmsgd(129, "Unfortunately, $n_pro$ $n_was$ poisonous.", nounrec);
 		deadflag = 1;
 	}
 }
@@ -768,7 +768,7 @@ static void v_attack(uchar missile, parse_rec *targrec, parse_rec *weprec) {
 			if (noun[wep - first_noun].drinkable) { /* i.e. a liquid */
 				alt_sysmsg(msgnum + 1, "$You$ splash $the_o$$object$ with "
 				           "$the_n$$noun$, but the liquid quickly evaporates "
-				           "without noticable effect.", weprec, targrec);
+				           "without noticeable effect.", weprec, targrec);
 				it_destroy(wep);
 			} else {
 				alt_sysmsg(msgnum,
diff --git a/engines/glk/agt/util.cpp b/engines/glk/agt/util.cpp
index b72aaae3124..ea8ae885ef2 100644
--- a/engines/glk/agt/util.cpp
+++ b/engines/glk/agt/util.cpp
@@ -1039,7 +1039,7 @@ static void read_filerec(file_info *rec_desc, const uchar *filedata) {
 			                                 filedata[2], filedata[3]);
 			break;
 		default:
-			fatal("Unreconized field type");
+			fatal("Unrecognized field type");
 		}
 		filedata += ft_leng[rec_desc->ftype];
 	}
@@ -1159,7 +1159,7 @@ static void write_filerec(file_info *rec_desc, uchar *filedata) {
 			break;
 		}
 		default:
-			fatal("Unreconized field type");
+			fatal("Unrecognized field type");
 		}
 		filedata += ft_leng[rec_desc->ftype];
 	}
diff --git a/engines/glk/window_pair.cpp b/engines/glk/window_pair.cpp
index 96d879a7c23..c6b2a22ad28 100644
--- a/engines/glk/window_pair.cpp
+++ b/engines/glk/window_pair.cpp
@@ -53,7 +53,7 @@ void PairWindow::rearrange(const Rect &box) {
 	_bbox = box;
 
 	if (_dir == winmethod_Arbitrary) {
-		// When a pair window is in "arbitrary" mode, each child window has it's own independant positioning,
+		// When a pair window is in "arbitrary" mode, each child window has it's own independent positioning,
 		// so thre's no need to be readjusting it
 		return;
 	}
diff --git a/engines/glk/zcode/processor_buffer.cpp b/engines/glk/zcode/processor_buffer.cpp
index bb6d8467628..ed9127e4474 100644
--- a/engines/glk/zcode/processor_buffer.cpp
+++ b/engines/glk/zcode/processor_buffer.cpp
@@ -188,7 +188,7 @@ void Processor::runtimeError(ErrorCode errNum) {
 		if (_err_report_mode == ERR_REPORT_ONCE) {
 			print_string(" (will ignore further occurrences)");
 		} else {
-			print_string(" (occurence ");
+			print_string(" (occurrence ");
 			print_long(_errorCount[errNum - 1], 10);
 			print_char(')');
 		}
diff --git a/engines/grim/font.cpp b/engines/grim/font.cpp
index e2df88e8da9..ea2086e95d3 100644
--- a/engines/grim/font.cpp
+++ b/engines/grim/font.cpp
@@ -108,7 +108,7 @@ uint16 Font::getCharIndex(unsigned char c) const {
 		if (_charIndex[i] == c2)
 			return i;
 	}
-	Debug::warning(Debug::Fonts, "The requsted character (code 0x%x) does not correspond to anything in the font data!", c2);
+	Debug::warning(Debug::Fonts, "The requested character (code 0x%x) does not correspond to anything in the font data!", c2);
 	// If we couldn't find the character then default to
 	// the first character in the font so that something
 	// gets loaded to prevent the game from crashing
diff --git a/engines/hugo/schedule.cpp b/engines/hugo/schedule.cpp
index 0c3c1f44bd4..c3bef93e2ff 100644
--- a/engines/hugo/schedule.cpp
+++ b/engines/hugo/schedule.cpp
@@ -1381,7 +1381,7 @@ Event *Scheduler::doAction(Event *curEvent) {
 		break;
 	case INIT_STORY_MODE:                             // act39: Init story_mode flag
 		// This is similar to the QUIET path mode, except that it is
-		// independant of it and it additionally disables the ">" prompt
+		// independent of it and it additionally disables the ">" prompt
 		gameStatus._storyModeFl = action->_a39._storyModeFl;
 		break;
 	case WARN:                                        // act40: Text box (CF TEXT)
diff --git a/engines/icb/barriers.cpp b/engines/icb/barriers.cpp
index 2261e96ab72..24d35056727 100644
--- a/engines/icb/barriers.cpp
+++ b/engines/icb/barriers.cpp
@@ -630,7 +630,7 @@ void _barrier_handler::Form_route_barrier_list(PXreal x, PXreal y, PXreal z, PXr
 	_rect rb; // rb meaning 'Route-Box'
 	uint32 j;
 	_child_group *clist[MAX_child_groups_per_parent * 2];
-	uint32 total_childs = 0; // seperate total for safety
+	uint32 total_childs = 0; // separate total for safety
 	int32 expanded_this_go;
 	_route_barrier *bar;
 	uint32 k;
diff --git a/engines/icb/drawpoly_pc.cpp b/engines/icb/drawpoly_pc.cpp
index e79be9b4434..98ed4e7dbca 100644
--- a/engines/icb/drawpoly_pc.cpp
+++ b/engines/icb/drawpoly_pc.cpp
@@ -1394,7 +1394,7 @@ void drawGUL3PC(uint32 *polyStart, const uint32 n, SVECTORPC *pVertex, SVECTOR *
 				setLineG4(line);
 				int32 cval;
 				if (_drawGouraud) {
-					// Give each vertex a seperate colour
+					// Give each vertex a separate colour
 					// Compute the colour scaling and clip it
 					if (rgbIn.r != 0) {
 						cval = ((wfrmRed * rgb0.r) / rgbIn.r);
@@ -2191,7 +2191,7 @@ void drawGTL3PC(uint32 *polyStart, const uint32 n, SVECTORPC *pVertex, SVECTOR *
 				setLineG4(line);
 				int32 cval;
 				if (_drawGouraud) {
-					// Give each vertex a seperate colour
+					// Give each vertex a separate colour
 					// Compute the colour scaling and clip it
 					if (rgbIn.r != 0) {
 						cval = ((wfrmRed * rgb0.r) / rgbIn.r);
diff --git a/engines/icb/event_manager.h b/engines/icb/event_manager.h
index 4061788e828..1a8a6979fae 100644
--- a/engines/icb/event_manager.h
+++ b/engines/icb/event_manager.h
@@ -43,7 +43,7 @@ namespace ICB {
 #define EVENT_MANAGER_MAX_TIMERS 4
 
 // Keeps track of which object is interested in hearing about events from which other objects and stores
-// events which have occured until they can be handled.
+// events which have occurred until they can be handled.
 class _event_manager {
 public:
 	// Default constructor and destructor.
diff --git a/engines/icb/map_marker_pc.cpp b/engines/icb/map_marker_pc.cpp
index a2bbad95e49..083b73f8dfb 100644
--- a/engines/icb/map_marker_pc.cpp
+++ b/engines/icb/map_marker_pc.cpp
@@ -36,7 +36,7 @@ namespace ICB {
 
 void _marker::___init() {
 	// read in the session markers file - this is the engine written file not the max Nico file
-	// read data into a structure as it needs to be modifiable and saveable which isnt posible with res_man files
+	// read data into a structure as it needs to be modifiable and saveable which isnt possible with res_man files
 	int32 len;
 
 	Zdebug("\n\n\n-------------*** Init marker file ***-------------");
diff --git a/engines/icb/options_manager_pc.cpp b/engines/icb/options_manager_pc.cpp
index 06163a43118..755ca9fbf81 100644
--- a/engines/icb/options_manager_pc.cpp
+++ b/engines/icb/options_manager_pc.cpp
@@ -6143,7 +6143,7 @@ void OptionsManager::DrawSlideShow() {
 		uint32 art2DClusterHash = NULL_HASH;
 
 		if (!IsAValidSlide(m_currentSlide, slideFile))
-			Fatal_error("Trying to display a non-existant slide image!");
+			Fatal_error("Trying to display a non-existent slide image!");
 
 		// Set this up for resman and open the thb file
 		sprintf(art2DCluster, ICON_CLUSTER_PATH);
diff --git a/engines/icb/player_pc.cpp b/engines/icb/player_pc.cpp
index 09cf742ab00..e6a7e23d33d 100644
--- a/engines/icb/player_pc.cpp
+++ b/engines/icb/player_pc.cpp
@@ -96,7 +96,7 @@ void _player::Update_input_state() {
 
 	// note - analogue controllers return a direction which is different from forward-and-rotate schemes
 
-	// this routine requires seperate pc/psx coding
+	// this routine requires separate pc/psx coding
 
 	//				pc devices
 	//				----------
diff --git a/engines/icb/remora.cpp b/engines/icb/remora.cpp
index 9638a1d605c..56c906c903f 100644
--- a/engines/icb/remora.cpp
+++ b/engines/icb/remora.cpp
@@ -872,7 +872,7 @@ void _remora::ClearAllText() {
 	m_nFirstLineToDraw = 0;
 
 	m_bScrollingRequired = FALSE8;
-	m_bScrolling = FALSE8; // these three need reseting so when we go to a new page we don't try scrolling off screen
+	m_bScrolling = FALSE8; // these three need resetting so when we go to a new page we don't try scrolling off screen
 	m_nStartYPixelOffset = 0;
 	m_eTextScroll = SCROLL_NONE;
 
diff --git a/engines/icb/res_man.cpp b/engines/icb/res_man.cpp
index 828be4de2bb..e33de90dd61 100644
--- a/engines/icb/res_man.cpp
+++ b/engines/icb/res_man.cpp
@@ -843,7 +843,7 @@ uint32 res_man::FindMemBlock(uint32 adj_len, RMParams *params) {
 			} while (search != -1);
 
 			if (!total_age)
-				Fatal_error("failed to build an age table - not really posible");
+				Fatal_error("failed to build an age table - not really possible");
 
 			//			now sort the ages
 			for (j = 0; j < total_age; j++)
diff --git a/engines/icb/route_manager.cpp b/engines/icb/route_manager.cpp
index 03fc954173a..2c7b9b4e651 100644
--- a/engines/icb/route_manager.cpp
+++ b/engines/icb/route_manager.cpp
@@ -88,7 +88,7 @@ void _game_session::Reset_route_manager() {
 
 	// remove used routes - just keeps the memory limit down
 
-	Zdebug("--new sesssion: reseting route manager service--");
+	Zdebug("--new sesssion: resetting route manager service--");
 }
 
 bool8 _game_session::Is_route_required(PXreal startx, PXreal startz, PXreal destx, PXreal destz) {
diff --git a/engines/icb/sound.h b/engines/icb/sound.h
index 1ed37420ad9..798217e659d 100644
--- a/engines/icb/sound.h
+++ b/engines/icb/sound.h
@@ -174,7 +174,7 @@ public:
 
 	CSfx *GetSfx(); // should be reasonably fast now...
 
-	// volume and pan together (faster than seperate)
+	// volume and pan together (faster than separate)
 	void GetVolumeAndPan(int32 &vol, int32 &pan);
 
 private:
diff --git a/engines/kyra/graphics/screen_eob_amiga.cpp b/engines/kyra/graphics/screen_eob_amiga.cpp
index 8f3782c2c69..4260b676d7f 100644
--- a/engines/kyra/graphics/screen_eob_amiga.cpp
+++ b/engines/kyra/graphics/screen_eob_amiga.cpp
@@ -278,7 +278,7 @@ void AmigaDOSFont::errorDialog(int index) {
 	if (index == 0) {
 		::GUI::displayErrorDialog(_(
 			"This AMIGA version requires the following font files:\n\nEOBF6.FONT\nEOBF6/6\nEOBF8.FONT\nEOBF8/8\n\n"
-			"If you used the orginal installer for the installation these files\nshould be located in the AmigaDOS system 'Fonts/' folder.\n"
+			"If you used the original installer for the installation these files\nshould be located in the AmigaDOS system 'Fonts/' folder.\n"
 			"Please copy them into the EOB game data directory.\n"
 		));
 
diff --git a/engines/lure/sound.cpp b/engines/lure/sound.cpp
index 070861cba49..6e35182fa88 100644
--- a/engines/lure/sound.cpp
+++ b/engines/lure/sound.cpp
@@ -663,7 +663,7 @@ void SoundManager::musicInterface_ContinuePlaying() {
  * off again because of a bug. Also, TrashReverb being triggered by doors opening
  * offscreen would be a bug. There is a third problem: the door opening sound lasts
  * much longer than 40 ms, so turning reverb back on 40 ms after starting the door
- * opening sound still results in a noticable reverb. All in all this explanation
+ * opening sound still results in a noticeable reverb. All in all this explanation
  * is not entirely convicing.
  * Another explanation would be that reverb was only meant to be on for the first
  * part of the game and should be turned off from the town onwards (this is what
diff --git a/engines/mads/mads.cpp b/engines/mads/mads.cpp
index f24975f2a26..a34b19301cd 100644
--- a/engines/mads/mads.cpp
+++ b/engines/mads/mads.cpp
@@ -129,7 +129,7 @@ void MADSEngine::loadOptions() {
 
 	// Note: MADS is weird in that sfx and music are handled by the same driver,
 	// and the game scripts themselves check for music being enabled before playing
-	// a "music" sound. Which means we can independantly mute music in ScummVM, but
+	// a "music" sound. Which means we can independently mute music in ScummVM, but
 	// otherwise all sound, music and sfx, is controlled by the SFX volume slider.
 	int soundVolume = MIN(255, ConfMan.getInt("sfx_volume"));
 	_sound->setVolume(soundVolume);
diff --git a/engines/mohawk/cstime_ui.cpp b/engines/mohawk/cstime_ui.cpp
index c4bbc7e2afd..d173b78ac50 100644
--- a/engines/mohawk/cstime_ui.cpp
+++ b/engines/mohawk/cstime_ui.cpp
@@ -285,7 +285,7 @@ void CSTimeInterface::mouseDown(Common::Point pos) {
 		return;
 	}
 
-	// TODO: case 20 ui craziness is handled seperately..
+	// TODO: case 20 ui craziness is handled separately..
 
 	CSTimeConversation *conv = _vm->getCase()->getCurrConversation();
 	if (_bookRect.contains(pos) || (_noteRect.contains(pos) && _note->havePiece(0xffff))) {
@@ -337,7 +337,7 @@ void CSTimeInterface::mouseMove(Common::Point pos) {
 	if (_note->getState() == 2)
 		return;
 
-	// TODO: case 20 ui craziness is handled seperately..
+	// TODO: case 20 ui craziness is handled separately..
 
 	if (_sceneRect.contains(pos) && !_vm->getCase()->getCurrScene()->eventIsActive()) {
 		_vm->getCase()->getCurrScene()->mouseMove(pos);
@@ -467,7 +467,7 @@ void CSTimeInterface::mouseUp(Common::Point pos) {
 
 	// TODO: if in sailing puzzle, sailing puzzle mouse up, return
 
-	// TODO: case 20 ui craziness is handled seperately..
+	// TODO: case 20 ui craziness is handled separately..
 
 	if (_sceneRect.contains(pos)) {
 		_vm->getCase()->getCurrScene()->mouseUp(pos);
diff --git a/engines/mohawk/livingbooks_code.cpp b/engines/mohawk/livingbooks_code.cpp
index 1e39504511d..f5feba92a39 100644
--- a/engines/mohawk/livingbooks_code.cpp
+++ b/engines/mohawk/livingbooks_code.cpp
@@ -1911,7 +1911,7 @@ uint LBCode::parseCode(const Common::String &source) {
 				code.push_back(kTokenCloseBracket);
 			counterPositions.pop_back();
 			break;
-		// comma (seperating function params)
+		// comma (separating function params)
 		case ',':
 			{
 			if (counterPositions.empty())
diff --git a/engines/mohawk/myst_stacks/myst.cpp b/engines/mohawk/myst_stacks/myst.cpp
index 165b84a50d3..2f30c6930c0 100644
--- a/engines/mohawk/myst_stacks/myst.cpp
+++ b/engines/mohawk/myst_stacks/myst.cpp
@@ -3347,7 +3347,7 @@ void Myst::o_forechamberDoor_init(uint16 var, const ArgumentsArray &args) {
 }
 
 void Myst::o_shipAccess_init(uint16 var, const ArgumentsArray &args) {
-	// Enable acces to the ship
+	// Enable access to the ship
 	if (_state.shipFloating) {
 		getInvokingResource<MystArea>()->setEnabled(true);
 	}
diff --git a/engines/myst3/database.cpp b/engines/myst3/database.cpp
index 8eb10af2d4c..59542f0de0a 100644
--- a/engines/myst3/database.cpp
+++ b/engines/myst3/database.cpp
@@ -881,7 +881,7 @@ void Database::patchLanguageMenu() {
 	// The scripts for the other languages only differ by the value set for AudioLanguage variable
 	// when the language selection is not English.
 	// This function patches the language selection script to set the appropriate value based
-	// on the detected game langage.
+	// on the detected game language.
 
 	// Script disassembly:
 	//	hotspot 5 > c[v1 != 0] (true)
diff --git a/engines/myst3/puzzles.cpp b/engines/myst3/puzzles.cpp
index 23e5e4eb7d0..86be3beb6af 100644
--- a/engines/myst3/puzzles.cpp
+++ b/engines/myst3/puzzles.cpp
@@ -1407,7 +1407,7 @@ void Puzzles::railRoadSwitchs() {
 		endFrame = 12;
 		break;
 	default:
-		error("Bad railroad switchs start value %d", startFrame);
+		error("Bad railroad switches start value %d", startFrame);
 		return;
 	}
 
diff --git a/engines/neverhood/gamemodule.cpp b/engines/neverhood/gamemodule.cpp
index 185d9b6831b..b016e610023 100644
--- a/engines/neverhood/gamemodule.cpp
+++ b/engines/neverhood/gamemodule.cpp
@@ -191,9 +191,9 @@ void GameModule::initMemoryPuzzle() {
 			setSubVar(VA_DICE_MEMORY_SYMBOLS, diceIndices.getNumber(), tileSymbols.getNumber());
 		// Insert special symbols tiles
 		for (uint32 i = 0; i < 3; ++i) {
-			int tileSymbolOccurence = _vm->_rnd->getRandomNumber(4 - 1) * 2 + 2;
-			setSubVar(VA_GOOD_DICE_NUMBERS, i, tileSymbolOccurence);
-			while (tileSymbolOccurence--)
+			int tileSymbolOccurrence = _vm->_rnd->getRandomNumber(4 - 1) * 2 + 2;
+			setSubVar(VA_GOOD_DICE_NUMBERS, i, tileSymbolOccurrence);
+			while (tileSymbolOccurrence--)
 				setSubVar(VA_TILE_SYMBOLS, availableTiles.getNumber(), getSubVar(VA_DICE_MEMORY_SYMBOLS, i));
 		}
 		// Fill the remaining tiles
diff --git a/engines/saga2/floating.cpp b/engines/saga2/floating.cpp
index 4c781beb076..6a91372d2a5 100644
--- a/engines/saga2/floating.cpp
+++ b/engines/saga2/floating.cpp
@@ -726,7 +726,7 @@ void drawFloatingWindows(gPort &port, const Point16 &offset, const Rect16 &clip)
 			oldExtent = bound(newExtent, oldExtent);
 			updateWindowSection(oldExtent);
 		} else {
-			//  Otherwise, update new and old positions seperately
+			//  Otherwise, update new and old positions separately
 
 			updateWindowSection(newExtent);
 			updateWindowSection(oldExtent);
diff --git a/engines/saga2/grequest.cpp b/engines/saga2/grequest.cpp
index 138b4b000d5..d32be7a8067 100644
--- a/engines/saga2/grequest.cpp
+++ b/engines/saga2/grequest.cpp
@@ -41,7 +41,7 @@ const int           maxLines = 16,
                     buttonWidth = 60;
 
 //  This function takes a string which is composed of several
-//  substrings, each seperated by a delimiter character, and
+//  substrings, each separated by a delimiter character, and
 //  breaks it up into the individual sub-strings.
 
 int16 SplitString(
diff --git a/engines/saga2/gtext.cpp b/engines/saga2/gtext.cpp
index 112d0fa0a4f..6c0a110fe7f 100644
--- a/engines/saga2/gtext.cpp
+++ b/engines/saga2/gtext.cpp
@@ -118,7 +118,7 @@ void DrawChar(gFont *font, int drawchar, int xpos, uint8 *baseline, uint8 color,
     This function renders a single bitmapped character into an offscreen
     buffer. The character will be "ballooned", i.e. expanded, by 1 pixel
     in each direction. It does not render the center part of the outlined
-    character in a different color -- that must be done as a seperate
+    character in a different color -- that must be done as a separate
     step.
 
     'drawchar' is the ascii code of the character to be drawn.
diff --git a/engines/saga2/idtypes.h b/engines/saga2/idtypes.h
index a66920f049a..3186a4829e8 100644
--- a/engines/saga2/idtypes.h
+++ b/engines/saga2/idtypes.h
@@ -47,7 +47,7 @@ const ObjectID      Nothing = 0,            // a reference to no object
                     ActorLimbo = 2,         // where dead actors go
                     ImportantLimbo = 3,     // where dead important objects go
                     ActorBaseID = 0x8000,   // high bit set for actors
-                    WorldBaseID = 0xF000;   // 4K posible worlds
+                    WorldBaseID = 0xF000;   // 4K possible worlds
 
 /* ===================================================================== *
    TileID
diff --git a/engines/saga2/objects.h b/engines/saga2/objects.h
index dd31cb93f1a..a1fb84fd4f8 100644
--- a/engines/saga2/objects.h
+++ b/engines/saga2/objects.h
@@ -77,7 +77,7 @@ struct ResourceGameObject {
 //  Base class of all objects
 //
 //  Unlike the object prototypes, the only subclass of GameObject is
-//  the actor subclass, which is kept in an entirely seperate table.
+//  the actor subclass, which is kept in an entirely separate table.
 //  This allows all objects to be kept in an array (indexed by ID number)
 
 #include "common/pack-start.h"
diff --git a/engines/saga2/objproto.h b/engines/saga2/objproto.h
index 4412c1d4eda..d510441bb1a 100644
--- a/engines/saga2/objproto.h
+++ b/engines/saga2/objproto.h
@@ -236,7 +236,7 @@ struct ResourceObjectPrototype {
 		objPropCharges      = (1 << 6),     // it's a missile weapon
 		objPropEdible       = (1 << 7),     // can be eaten
 		objPropFlipped      = (1 << 8),     // flipped left/right on ground
-		objPropVisOpen      = (1 << 9),     // Object has seperate "visible" sprite
+		objPropVisOpen      = (1 << 9),     // Object has separate "visible" sprite
 		objPropHidden       = (1 << 10),    // "How not to be seen".
 		objPropGhosted      = (1 << 11),    // Object permanently ghosted
 		objPropHardSurface  = (1 << 12),    // Object makes hard sound when struck
diff --git a/engines/saga2/panel.h b/engines/saga2/panel.h
index d86bcf666ad..be85481fd18 100644
--- a/engines/saga2/panel.h
+++ b/engines/saga2/panel.h
@@ -75,7 +75,7 @@ void EventLoop(bool &running, bool modal = false);
  * ===================================================================== */
 
 enum gEventType {
-	gEventNone = 0,                         // no event occured
+	gEventNone = 0,                         // no event occurred
 	gEventMouseDown,                        // left button pressed
 	gEventMouseUp,                          // left button released
 	gEventRMouseDown,                       // right button pressed
@@ -98,7 +98,7 @@ enum gEventType {
 
 struct gEvent {
 	gPanel          *panel;                 // where event came from
-	enum gEventType eventType;              // type of event that occured
+	enum gEventType eventType;              // type of event that occurred
 	Point16         mouse;                  // mouse position
 	int32           value;                  // new value of control
 	gWindow         *window;                // active window
diff --git a/engines/saga2/script.h b/engines/saga2/script.h
index 6fe9da5e140..9d373d0bfa9 100644
--- a/engines/saga2/script.h
+++ b/engines/saga2/script.h
@@ -38,7 +38,7 @@ typedef int16   ThreadID;
 
 enum scriptResult {
 
-	//  Code returned when attempt to run a non-existant script
+	//  Code returned when attempt to run a non-existent script
 	scriptResultNoScript = 0,
 
 	//  Code returned when script was aborted before completion
diff --git a/engines/saga2/tilemode.cpp b/engines/saga2/tilemode.cpp
index c3eec14bee0..fcfacac3b46 100644
--- a/engines/saga2/tilemode.cpp
+++ b/engines/saga2/tilemode.cpp
@@ -798,7 +798,7 @@ void TileModeHandleTask() {
 			} else {
 				//  Calculate the mouse's position on the tilemap,
 				//  including the shape of the terrain. Actually
-				//  this returns two seperate coords: The exact point
+				//  this returns two separate coords: The exact point
 				//  clicked on, and the projection on the floor
 				//  beneath the clicked point.
 				tilePickExactPos = pickTile(lastMousePos,
diff --git a/engines/sci/console.cpp b/engines/sci/console.cpp
index 87fccc747b8..b719cd289ff 100644
--- a/engines/sci/console.cpp
+++ b/engines/sci/console.cpp
@@ -3656,7 +3656,7 @@ void Console::printKernelCallsFound(int kernelFuncNum, bool showFoundScripts) {
 	Common::sort(resources.begin(), resources.end());
 
 	if (showFoundScripts)
-		debugPrintf("%d scripts found, dissassembling...\n", resources.size());
+		debugPrintf("%d scripts found, disassembling...\n", resources.size());
 
 	int scriptSegment;
 	Script *script;
diff --git a/engines/sci/graphics/scifont.cpp b/engines/sci/graphics/scifont.cpp
index 36599637a9b..340feb462f8 100644
--- a/engines/sci/graphics/scifont.cpp
+++ b/engines/sci/graphics/scifont.cpp
@@ -297,7 +297,7 @@ void GfxFontFromResource::draw(uint16 chr, int16 top, int16 left, byte color, bo
 				if (0 <= screenX && screenX < screenWidth && 0 <= screenY && screenY < screenHeight) {
 					_screen->putFontPixel(top, screenX, y, color);
 				} else {
-					warning("%s glpyh %d drawn out of bounds: %d, %d", _resource->name().c_str(), chr, screenX, screenY);
+					warning("%s glyph %d drawn out of bounds: %d, %d", _resource->name().c_str(), chr, screenX, screenY);
 				}
 			}
 			b = b << 1;
@@ -334,7 +334,7 @@ void GfxFontFromResource::drawToBuffer(uint16 chr, int16 top, int16 left, byte c
 					int offset = bufY * bufWidth + bufX;
 					buffer[offset] = color;
 				} else {
-					warning("%s glpyh %d drawn out of bounds: %d, %d", _resource->name().c_str(), chr, bufX, bufY);
+					warning("%s glyph %d drawn out of bounds: %d, %d", _resource->name().c_str(), chr, bufX, bufY);
 				}
 			}
 			b = b << 1;
diff --git a/engines/sci/sci.h b/engines/sci/sci.h
index 3d6e85be5de..6ca99befe28 100644
--- a/engines/sci/sci.h
+++ b/engines/sci/sci.h
@@ -215,7 +215,7 @@ public:
 	 * Processes a multilanguage string based on the current language settings and
 	 * returns a string that is ready to be displayed.
 	 * @param str		the multilanguage string
-	 * @param sep		optional seperator between main language and subtitle language,
+	 * @param sep		optional separator between main language and subtitle language,
 	 *					if NULL is passed no subtitle will be added to the returned string
 	 * @return processed string
 	 */
diff --git a/engines/scumm/charset.cpp b/engines/scumm/charset.cpp
index 1a2fed6e031..5144a5d391f 100644
--- a/engines/scumm/charset.cpp
+++ b/engines/scumm/charset.cpp
@@ -1328,7 +1328,7 @@ void CharsetRendererTownsV3::drawBits1(Graphics::Surface &dest, int x, int y, co
 	}
 
 	if (y + height > dest.h)
-		error("Trying to draw below screen boundries");
+		error("Trying to draw below screen boundaries");
 
 #ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
 #ifdef USE_RGB_COLOR
diff --git a/engines/scumm/gfx.cpp b/engines/scumm/gfx.cpp
index 5d42285550b..0f47f4cfcc6 100644
--- a/engines/scumm/gfx.cpp
+++ b/engines/scumm/gfx.cpp
@@ -269,7 +269,7 @@ void Gdi::init() {
 		// virtual screen strips don't match the display screen strips anymore. To
 		// overcome that problem, we simply use a screen pitch that is 8 pixel wider
 		// than the actual screen width, and always draw one strip more than needed to
-		// the backbuf (thus we have to treat the right border seperately).
+		// the backbuf (thus we have to treat the right border separately).
 		_numStrips += 1;
 	}
 }
diff --git a/engines/scumm/resource.cpp b/engines/scumm/resource.cpp
index cecac1bf625..fbe56102b62 100644
--- a/engines/scumm/resource.cpp
+++ b/engines/scumm/resource.cpp
@@ -1655,7 +1655,7 @@ void ScummEngine::applyWorkaroundIfNeeded(ResType type, int idx) {
 	// WORKAROUND: FM-TOWNS Zak used the extra 40 pixels at the bottom to increase the inventory to 10 items
 	// if we trim to 200 pixels, we can show only 6 items
 	// therefore we patch the inventory script (20)
-	// replacing the 5 occurences of 10 as limit to 6
+	// replacing the 5 occurrences of 10 as limit to 6
 	if (_game.platform == Common::kPlatformFMTowns && _game.id == GID_ZAK && ConfMan.getBool("trim_fmtowns_to_200_pixels")) {
 		if (type == rtScript && idx == 20) {
 			byte *ptr = getResourceAddress(rtScript, idx);
diff --git a/engines/scumm/scumm.cpp b/engines/scumm/scumm.cpp
index b8ef76d6ec9..eefc2498135 100644
--- a/engines/scumm/scumm.cpp
+++ b/engines/scumm/scumm.cpp
@@ -539,7 +539,7 @@ ScummEngine::ScummEngine(OSystem *syst, const DetectorResult &dr)
 		if (ConfMan.getBool("aspect_ratio") && !ConfMan.getBool("trim_fmtowns_to_200_pixels")) {
 			GUI::MessageDialog dialog(
 				_("You have enabled 'aspect ratio correction'. However, FM-TOWNS' natural resolution is 320x240, which doesn't allow aspect ratio correction.\n"
-				  "Aspect ratio correction can be acheived by trimming the resolution to 320x200, under 'engine' tab."));
+				  "Aspect ratio correction can be achieved by trimming the resolution to 320x200, under 'engine' tab."));
 			dialog.runModal();
 		}
 
diff --git a/engines/sherlock/tattoo/widget_quit.cpp b/engines/sherlock/tattoo/widget_quit.cpp
index 92fabc49bfd..8bbb0954fa1 100644
--- a/engines/sherlock/tattoo/widget_quit.cpp
+++ b/engines/sherlock/tattoo/widget_quit.cpp
@@ -56,7 +56,7 @@ void WidgetQuit::show() {
 	_surface.writeString(FIXED(WishToQuit), Common::Point((_surface.width() - _surface.stringWidth(FIXED(WishToQuit))) / 2,
 		_surface.fontHeight() + 9), INFO_TOP);
 
-	// Draw the horizontal bars seperating the commands and the message
+	// Draw the horizontal bars separating the commands and the message
 	int yp = (_surface.fontHeight() + 4) * 2 + 3;
 	for (int idx = 0; idx < 2; ++idx) {
 		_surface.SHtransBlitFrom(images[4], Common::Point(0, yp - 1));
diff --git a/engines/sky/intro.cpp b/engines/sky/intro.cpp
index 56d0d4b90b0..30102ac02f2 100644
--- a/engines/sky/intro.cpp
+++ b/engines/sky/intro.cpp
@@ -704,7 +704,7 @@ bool Intro::nextPart(uint16 *&data) {
 		return true;
 	case FADEUP:
 		_skyScreen->paletteFadeUp(*data++);
-		_relDelay += 32 * 20; // hack: the screen uses a seperate delay function for the
+		_relDelay += 32 * 20; // hack: the screen uses a separate delay function for the
 							  // blocking fadeups. So add 32*20 msecs to out delay counter.
 		return true;
 	case FADEDOWN:
diff --git a/engines/sludge/builtin.cpp b/engines/sludge/builtin.cpp
index 4d394e4e6d1..4029417a452 100644
--- a/engines/sludge/builtin.cpp
+++ b/engines/sludge/builtin.cpp
@@ -825,7 +825,7 @@ builtIn(anim) {
 	// First store the frame numbers and take 'em off the stack
 	PersonaAnimation *ba = new PersonaAnimation(numParams - 1, fun->stack);
 
-	// Only remaining paramter is the file number
+	// Only remaining parameter is the file number
 	int fileNumber;
 	if (!fun->stack->thisVar.getValueType(fileNumber, SVT_FILE))
 		return BR_ERROR;
diff --git a/engines/stark/movement/movement.cpp b/engines/stark/movement/movement.cpp
index b534e9a1bd6..c36d611d819 100644
--- a/engines/stark/movement/movement.cpp
+++ b/engines/stark/movement/movement.cpp
@@ -44,7 +44,7 @@ Movement *Movement::construct(uint32 type, Resources::ItemVisual *item) {
 		case kTypeTurn:
 			return new Turn(Resources::Object::cast<Resources::FloorPositionedItem>(item));
 		default:
-			error("Unexepected movement type '%d'", type);
+			error("Unexpected movement type '%d'", type);
 	}
 }
 
diff --git a/engines/supernova/supernova1/state.cpp b/engines/supernova/supernova1/state.cpp
index 4eda1ba25fa..c48916b5d0b 100644
--- a/engines/supernova/supernova1/state.cpp
+++ b/engines/supernova/supernova1/state.cpp
@@ -1212,20 +1212,20 @@ bool GameManager1::genericInteract(Action verb, Object &obj1, Object &obj2) {
 			_vm->renderBox(91, 99, 138, 9, kColorDarkBlue);
 			edit(input, 91, 100, 5);
 
-			int seperator = -1;
+			int separator = -1;
 			for (uint i = 0; i < input.size(); ++i) {
 				if (input[i] == ':') {
-					seperator = i;
+					separator = i;
 					break;
 				}
 			}
-			if ((seperator == -1) || (seperator > 2)) {
+			if ((separator == -1) || (separator > 2)) {
 				validInput = false;
 				continue;
 			}
 
 			int decimalPlace = 1;
-			for (int i = 0; i < seperator; ++i) {
+			for (int i = 0; i < separator; ++i) {
 				if (Common::isDigit(input[i])) {
 					hours = hours * decimalPlace + (input[i] - '0');
 					decimalPlace *= 10;
@@ -1235,7 +1235,7 @@ bool GameManager1::genericInteract(Action verb, Object &obj1, Object &obj2) {
 				}
 			}
 			decimalPlace = 1;
-			for (uint i = seperator + 1; i < input.size(); ++i) {
+			for (uint i = separator + 1; i < input.size(); ++i) {
 				if (Common::isDigit(input[i])) {
 					minutes = minutes * decimalPlace + (input[i] - '0');
 					decimalPlace *= 10;
diff --git a/engines/sword1/logic.cpp b/engines/sword1/logic.cpp
index da5fbb3a0ad..f3abc36f220 100644
--- a/engines/sword1/logic.cpp
+++ b/engines/sword1/logic.cpp
@@ -1552,19 +1552,19 @@ int Logic::fnGetPos(Object *cpt, int32 id, int32 targetId, int32 b, int32 c, int
 	}
 	_scriptVars[RETURN_VALUE_3] = target->o_dir;
 
-	int32 megaSeperation;
+	int32 megaSeparation;
 	if (targetId == DUANE)
-		megaSeperation = 70; // George & Duane stand with feet 70 pixels apart when at full scale
+		megaSeparation = 70; // George & Duane stand with feet 70 pixels apart when at full scale
 	else if (targetId == BENOIR)
-		megaSeperation = 61; // George & Benoir
+		megaSeparation = 61; // George & Benoir
 	else
-		megaSeperation = 42; // George & Nico/Goinfre stand with feet 42 pixels apart when at full scale
+		megaSeparation = 42; // George & Nico/Goinfre stand with feet 42 pixels apart when at full scale
 
 	if (target->o_status & STAT_SHRINK) {
 		int32 scale = (target->o_scale_a * target->o_ycoord + target->o_scale_b) / 256;
-		_scriptVars[RETURN_VALUE_4] = (megaSeperation * scale) / 256;
+		_scriptVars[RETURN_VALUE_4] = (megaSeparation * scale) / 256;
 	} else
-		_scriptVars[RETURN_VALUE_4] = megaSeperation;
+		_scriptVars[RETURN_VALUE_4] = megaSeparation;
 	return SCRIPT_CONT;
 }
 
diff --git a/engines/sword25/kernel/filesystemutil.h b/engines/sword25/kernel/filesystemutil.h
index 9c20de76969..3ef27f131b3 100644
--- a/engines/sword25/kernel/filesystemutil.h
+++ b/engines/sword25/kernel/filesystemutil.h
@@ -68,7 +68,7 @@ public:
 	static Common::String getUserdataDirectory();
 
 	/**
-	 * @return              Returns the path seperator
+	 * @return              Returns the path separator
 	 */
 	static Common::String  getPathSeparator();
 
diff --git a/engines/sword25/package/packagemanager.h b/engines/sword25/package/packagemanager.h
index b958a445ec5..11b1b50dd76 100644
--- a/engines/sword25/package/packagemanager.h
+++ b/engines/sword25/package/packagemanager.h
@@ -37,7 +37,7 @@
  * In the package manager, note the following:
  * 1. It creates a completely new (virtual) directory tree in the packages and directories
  *    can be mounted.
- * 2. To seperate elements of a directory path '/' must be used rather than '\'
+ * 2. To separate elements of a directory path '/' must be used rather than '\'
  * 3. LoadDirectoryAsPackage should only be used for testing. The final release will be
  *    have all files in packages.
  *
@@ -65,7 +65,7 @@ namespace Sword25 {
  *
  * 1. It creates a completely new (virtual) directory tree in the packages and directories
  *    can be mounted.
- * 2. To seperate elements of a directory path '/' must be used rather than '\'
+ * 2. To separate elements of a directory path '/' must be used rather than '\'
  * 3. LoadDirectoryAsPackage should only be used for testing. The final release will be
  *    have all files in packages.
  */
diff --git a/engines/tinsel/anim.cpp b/engines/tinsel/anim.cpp
index 6111347879d..b7d583bf264 100644
--- a/engines/tinsel/anim.cpp
+++ b/engines/tinsel/anim.cpp
@@ -162,7 +162,7 @@ SCRIPTSTATE DoNextFrame(ANIM *pAnim) {
 			// pFunc is a function pointer that's part of a union and is assumed to be 32-bits.
 			// There is no known place where a function pointer is stored inside the animation
 			// scripts, something which wouldn't have worked anyway. Having played through the
-			// entire game, there hasn't been any occurence of this case, so just error out here
+			// entire game, there hasn't been any occurrence of this case, so just error out here
 			// in case we missed something (highly unlikely though)
 			error("ANI_CALL opcode encountered! Please report this error to the ScummVM team");
 			//(*pAni[pAnim->scriptIndex].pFunc)(pAnim);
diff --git a/engines/tinsel/graphics.cpp b/engines/tinsel/graphics.cpp
index 95b39a40c69..5806e012692 100644
--- a/engines/tinsel/graphics.cpp
+++ b/engines/tinsel/graphics.cpp
@@ -765,7 +765,7 @@ static void t3TransWNZ(DRAWOBJECT *pObj, uint8 *srcP, uint8 *destP) {
 				t3getRGB(dstColor, dstR, dstG, dstB);
 
 				if ((pObj->colorFlags & 4) != 0) { // additive blending
-					// orginal algo:
+					// original algo:
 					// color &= 0b1111011111011111;
 					// color += dstColor & 0b1111011111011111;
 					// if (color > 0xFFFF) {
diff --git a/engines/titanic/core/multi_drop_target.cpp b/engines/titanic/core/multi_drop_target.cpp
index bcdbcde1737..92adfe12797 100644
--- a/engines/titanic/core/multi_drop_target.cpp
+++ b/engines/titanic/core/multi_drop_target.cpp
@@ -49,17 +49,17 @@ void CMultiDropTarget::load(SimpleFile *file) {
 bool CMultiDropTarget::DropObjectMsg(CDropObjectMsg *msg) {
 	CStringParser parser1(_dropFrames);
 	CStringParser parser2(_dropNames);
-	CString seperatorChars = ",";
+	CString separatorChars = ",";
 
 	// WORKAROUND: The original didn't break out of loop if a drop target
 	// succeeded, nor did it return the item to the inventory if incorrect
-	while (parser2.parse(_itemMatchName, seperatorChars)) {
+	while (parser2.parse(_itemMatchName, separatorChars)) {
 		_dropFrame = parser1.readInt();
 		if (CDropTarget::DropObjectMsg(msg))
 			return true;
 
-		parser1.skipSeperators(seperatorChars);
-		parser2.skipSeperators(seperatorChars);
+		parser1.skipSeparators(separatorChars);
+		parser2.skipSeparators(separatorChars);
 	}
 
 	msg->_item->petAddToInventory();
diff --git a/engines/titanic/support/string_parser.cpp b/engines/titanic/support/string_parser.cpp
index 496440a9736..1e432ee20ad 100644
--- a/engines/titanic/support/string_parser.cpp
+++ b/engines/titanic/support/string_parser.cpp
@@ -25,15 +25,15 @@
 
 namespace Titanic {
 
-void CStringParser::skipSeperators(const CString &seperatorChars) {
+void CStringParser::skipSeparators(const CString &separatorChars) {
 	for (; _index < size(); ++_index) {
 		char c = (*this)[_index];
-		if (seperatorChars.indexOf(c) == -1)
+		if (separatorChars.indexOf(c) == -1)
 			break;
 	}
 }
 
-bool CStringParser::parse(CString &resultStr, const CString &seperatorChars, bool allowQuotes) {
+bool CStringParser::parse(CString &resultStr, const CString &separatorChars, bool allowQuotes) {
 	if (_index >= size())
 		return false;
 
@@ -41,7 +41,7 @@ bool CStringParser::parse(CString &resultStr, const CString &seperatorChars, boo
 	bool quoteFlag = false;
 	while (_index < size()) {
 		char c = (*this)[_index];
-		if (!quoteFlag && seperatorChars.indexOf(c) >= 0)
+		if (!quoteFlag && separatorChars.indexOf(c) >= 0)
 			break;
 
 		if (allowQuotes) {
diff --git a/engines/titanic/support/string_parser.h b/engines/titanic/support/string_parser.h
index f89caacfb51..74f53ad47db 100644
--- a/engines/titanic/support/string_parser.h
+++ b/engines/titanic/support/string_parser.h
@@ -50,19 +50,19 @@ public:
 	CStringParser(const CString &str) : CString(str), _index(0) {}
 
 	/**
-	 * Skips over any specified seperator characters in our string
+	 * Skips over any specified separator characters in our string
 	 * at the current index
 	 */
-	void skipSeperators(const CString &seperatorChars);
+	void skipSeparators(const CString &separatorChars);
 
 	/**
 	 * Parses out a string from a source string at the current index
 	 * @param resultStr			String to hold the resulting sring
-	 * @param seperatorChras	List of characters that seperate string values
+	 * @param separatorChras	List of characters that separate string values
 	 * @param allowQuotes		If true, handles double-quoted substrings
 	 * @returns		True if a string entry was extracted
 	 */
-	bool parse(CString &resultStr, const CString &seperatorChars, bool allowQuotes = false);
+	bool parse(CString &resultStr, const CString &separatorChars, bool allowQuotes = false);
 
 	/**
 	 * Reads an integer from the string
diff --git a/engines/tucker/tucker.cpp b/engines/tucker/tucker.cpp
index fc02064be84..1fe3780e4b1 100644
--- a/engines/tucker/tucker.cpp
+++ b/engines/tucker/tucker.cpp
@@ -3485,7 +3485,7 @@ int TuckerEngine::executeTableInstruction() {
 		//   Fixed: 61dw buw,148,125,wsm,buw,148,132,wsm,mof,pan,01,wat,050[...]
 		//                                               ^^^^^^^^^^
 		// To work around the issue in the problematic versions we inject these two
-		// instructions after the first occurence of the 'wsm' instruction (which
+		// instructions after the first occurrence of the 'wsm' instruction (which
 		// proves good enough).
 		if (_location == kLocationStoreRoom && _nextAction == 61) {
 			setCursorState(kCursorStateDisabledHidden);
diff --git a/engines/ultima/nuvie/core/converse_interpret.cpp b/engines/ultima/nuvie/core/converse_interpret.cpp
index 97c36c5b656..7f932f4e300 100644
--- a/engines/ultima/nuvie/core/converse_interpret.cpp
+++ b/engines/ultima/nuvie/core/converse_interpret.cpp
@@ -554,7 +554,7 @@ bool ConverseInterpret::op(stack<converse_typed_value> &i) {
 		// FIXME: probably need to do more real actor/object set-up here
 		cnpc = converse->actors->get_actor(npc_num(pop_arg(i)));
 		cnpc_obj = cnpc->make_obj();
-		cnpc_obj->frame_n = 0; // FIX for actors orginal direction.
+		cnpc_obj->frame_n = 0; // FIX for actors original direction.
 		cnpc_obj->obj_n = OBJ_U6_HORSE_WITH_RIDER; // mount up.
 		cnpc->init_from_obj(cnpc_obj);
 		delete_obj(cnpc_obj);
diff --git a/engines/ultima/nuvie/core/effect_manager.cpp b/engines/ultima/nuvie/core/effect_manager.cpp
index 2168b02ec9e..710bc5e83cf 100644
--- a/engines/ultima/nuvie/core/effect_manager.cpp
+++ b/engines/ultima/nuvie/core/effect_manager.cpp
@@ -52,7 +52,7 @@ void EffectManager::delete_effect(Effect *eff) {
 	}
 }
 
-/* Add an (already existant) effect to the list.
+/* Add an (already existent) effect to the list.
  */
 void EffectManager::add_effect(Effect *eff) {
 	effects.push_back(eff);
diff --git a/engines/ultima/nuvie/core/events.h b/engines/ultima/nuvie/core/events.h
index a633c7233cd..35b7039c4b9 100644
--- a/engines/ultima/nuvie/core/events.h
+++ b/engines/ultima/nuvie/core/events.h
@@ -421,7 +421,7 @@ public:
 	}
 // These cursor methods are use to make sure Events knows where the cursor is
 // when objects are selected with ENTER. (since MapWindow and InventoryView
-// may each independantly show/hide their own cursors)
+// may each independently show/hide their own cursors)
 	void moveCursorToMapWindow(bool ToggleCursor = false);
 	void moveCursorToInventory();
 
diff --git a/engines/ultima/nuvie/core/party.cpp b/engines/ultima/nuvie/core/party.cpp
index 3cce3767a84..b9a1326714b 100644
--- a/engines/ultima/nuvie/core/party.cpp
+++ b/engines/ultima/nuvie/core/party.cpp
@@ -528,7 +528,7 @@ bool Party::has_obj(uint16 obj_n, uint8 quality, bool match_zero_qual) {
 	return false;
 }
 
-// Removes the first occurence of an object in the party.
+// Removes the first occurrence of an object in the party.
 bool Party::remove_obj(uint16 obj_n, uint8 quality) {
 	uint16 i;
 	Obj *obj;
diff --git a/engines/ultima/nuvie/sound/adplug/u6m.cpp b/engines/ultima/nuvie/sound/adplug/u6m.cpp
index 62621313da4..649b42bb906 100644
--- a/engines/ultima/nuvie/sound/adplug/u6m.cpp
+++ b/engines/ultima/nuvie/sound/adplug/u6m.cpp
@@ -308,7 +308,7 @@ void Cu6mPlayer::command_5(int channel) {
 
 
 // --------------------------------------------
-// Set vibrato paramters
+// Set vibrato parameters
 // Format: 6c mn
 // c = channel
 // m = vibrato double amplitude
diff --git a/engines/ultima/ultima1/u1gfx/drawing_support.h b/engines/ultima/ultima1/u1gfx/drawing_support.h
index 24ae93e30f7..779a1c88956 100644
--- a/engines/ultima/ultima1/u1gfx/drawing_support.h
+++ b/engines/ultima/ultima1/u1gfx/drawing_support.h
@@ -56,7 +56,7 @@ public:
 	void drawFrame();
 
 	/**
-	 * Draw a frame around the viewport area of the screen, and a vertical seperator line
+	 * Draw a frame around the viewport area of the screen, and a vertical separator line
 	 * to the bottom of the screen to separate the status and info areas
 	 */
 	void drawGameFrame();
diff --git a/engines/ultima/ultima4/core/utils.h b/engines/ultima/ultima4/core/utils.h
index 3f33dbdb737..973e0498716 100644
--- a/engines/ultima/ultima4/core/utils.h
+++ b/engines/ultima/ultima4/core/utils.h
@@ -115,7 +115,7 @@ Common::String xu4_to_string(int val);
 
 /**
  * Splits a Common::String into substrings, divided by the charactars in
- * separators.  Multiple adjacent seperators are treated as one.
+ * separators.  Multiple adjacent separators are treated as one.
  */
 Std::vector<Common::String> split(const Common::String &s, const Common::String &separators);
 
diff --git a/engines/ultima/ultima4/gfx/screen.h b/engines/ultima/ultima4/gfx/screen.h
index 8bffb9d28ab..eed019270c2 100644
--- a/engines/ultima/ultima4/gfx/screen.h
+++ b/engines/ultima/ultima4/gfx/screen.h
@@ -285,7 +285,7 @@ public:
 	 * Scale an image up.  The resulting image will be scale * the
 	 * original dimensions.  The original image is no longer deleted.
 	 * n is the number of tiles in the image; each tile is filtered
-	 * seperately. filter determines whether or not to filter the
+	 * separately. filter determines whether or not to filter the
 	 * resulting image.
 	 */
 	Image *screenScale(Image *src, int scale, int n, int filter);
diff --git a/engines/ultima/ultima8/usecode/uc_list.cpp b/engines/ultima/ultima8/usecode/uc_list.cpp
index 3241d147fd1..e2cb6df3a25 100644
--- a/engines/ultima/ultima8/usecode/uc_list.cpp
+++ b/engines/ultima/ultima8/usecode/uc_list.cpp
@@ -96,7 +96,7 @@ void UCList::assignString(uint32 index, uint16 str) {
 }
 
 void UCList::removeString(uint16 s, bool nodel) {
-	// do we need to erase all occurences of str or just the first one?
+	// do we need to erase all occurrences of str or just the first one?
 	// (deleting all, currently)
 	const Std::string &str = UCMachine::get_instance()->getString(s);
 	for (unsigned int i = 0; i < _size; i++) {
diff --git a/engines/ultima/ultima8/usecode/uc_list.h b/engines/ultima/ultima8/usecode/uc_list.h
index c3231925362..c484f54b19b 100644
--- a/engines/ultima/ultima8/usecode/uc_list.h
+++ b/engines/ultima/ultima8/usecode/uc_list.h
@@ -37,7 +37,7 @@ namespace Ultima8 {
 // Question: how are unionList/subtractList supposed to know what to do?
 // their behaviour differs if this is a stringlist
 
-// Question: does subtractList remove _all_ occurences of elements or only 1?
+// Question: does subtractList remove _all_ occurrences of elements or only 1?
 
 class UCList {
 	Std::vector<uint8> _elements;
@@ -86,7 +86,7 @@ public:
 	}
 
 	void remove(const uint8 *e) {
-		// do we need to erase all occurences of e or just the first one?
+		// do we need to erase all occurrences of e or just the first one?
 		// (deleting all, currently)
 		for (unsigned int i = 0; i < _size; i++) {
 			bool equal = true;
diff --git a/engines/ultima/ultima8/world/actors/u8_avatar_mover_process.cpp b/engines/ultima/ultima8/world/actors/u8_avatar_mover_process.cpp
index c18f0890e16..ecfc30eda6d 100644
--- a/engines/ultima/ultima8/world/actors/u8_avatar_mover_process.cpp
+++ b/engines/ultima/ultima8/world/actors/u8_avatar_mover_process.cpp
@@ -198,7 +198,7 @@ void U8AvatarMoverProcess::handleCombatMode() {
 	}
 
 	if (_mouseButton[1].isState(MBS_DOWN) && _mouseButton[1].isState(MBS_HANDLED)) {
-		// Note: Orginal game allowed a move animation on a single right click.
+		// Note: Original game allowed a move animation on a single right click.
 		// This implementation needs right mouse to be held.
 		setMovementFlag(MOVE_MOUSE_DIRECTION);
 
@@ -368,7 +368,7 @@ void U8AvatarMoverProcess::handleNormalMode() {
 	}
 
 	if (_mouseButton[1].isState(MBS_DOWN) && _mouseButton[1].isState(MBS_HANDLED)) {
-		// Note: Orginal game allowed a move animation on a single right click.
+		// Note: Original game allowed a move animation on a single right click.
 		// This implementation needs right mouse to be held.
 		setMovementFlag(MOVE_MOUSE_DIRECTION);
 	}
diff --git a/engines/ultima/ultima8/world/gravity_process.cpp b/engines/ultima/ultima8/world/gravity_process.cpp
index adeb5e9206c..412824d6fe3 100644
--- a/engines/ultima/ultima8/world/gravity_process.cpp
+++ b/engines/ultima/ultima8/world/gravity_process.cpp
@@ -174,7 +174,7 @@ void GravityProcess::run() {
 				int approx_v = ABS(_xSpeed) + ABS(_ySpeed) + _zSpeed;
 
 				// Apply an impulse on the x/y plane in a random direction
-				// in a 180 degree pie around the orginal vector in x/y
+				// in a 180 degree pie around the original vector in x/y
 				double heading_r = atan2((double)_ySpeed, (double)_xSpeed);
 				double deltah_r = static_cast<double>(getRandom())
 				                  * M_PI / U8_RAND_MAX - M_PI / 2;
diff --git a/engines/ultima/ultima8/world/item.cpp b/engines/ultima/ultima8/world/item.cpp
index 5be5990eeeb..45da2613ba2 100644
--- a/engines/ultima/ultima8/world/item.cpp
+++ b/engines/ultima/ultima8/world/item.cpp
@@ -1717,7 +1717,7 @@ void Item::setupLerp(int32 gametick) {
 	// We use (tick % speed == 0) here. To be completely faithful to the original
 	// game it should be (tick % speed == tick % _objId).  That is how the game
 	// does it, but it also causes animation frame mismatches on multi-shape
-	// objects.  This is easily noticable on the waterfall West of Tenebrae,
+	// objects.  This is easily noticeable on the waterfall West of Tenebrae,
 	// which appears to tear slightly even on the original.
 	//
 	// In the original it was likely done to spread CPU time over different frames,
diff --git a/graphics/fonts/macfont.cpp b/graphics/fonts/macfont.cpp
index fe237951564..742ae693ba5 100644
--- a/graphics/fonts/macfont.cpp
+++ b/graphics/fonts/macfont.cpp
@@ -163,7 +163,7 @@ bool MacFontFamily::load(Common::SeekableReadStream &stream) {
 			_ffBBoxes[i]._right  = stream.readSint16BE();
 			_ffBBoxes[i]._top    = stream.readSint16BE();
 
-			debug(10, "style: %d left: %g bottom: %g rigth: %g top: %g", _ffBBoxes[i]._style,
+			debug(10, "style: %d left: %g bottom: %g right: %g top: %g", _ffBBoxes[i]._style,
 					_ffBBoxes[i]._left / (double)(1<<12), _ffBBoxes[i]._bottom / (double)(1<<12),
 					_ffBBoxes[i]._right / (double)(1<<12), _ffBBoxes[i]._top / (double)(1<<12));
 		}
diff --git a/graphics/fonts/ttf.cpp b/graphics/fonts/ttf.cpp
index cc6e212bd7f..05ff8eecabc 100644
--- a/graphics/fonts/ttf.cpp
+++ b/graphics/fonts/ttf.cpp
@@ -751,7 +751,7 @@ bool TTFFont::cacheGlyph(Glyph &glyph, uint32 chr) const {
 	glyph.slot = slot;
 
 	// We use the light target and render mode to improve the looks of the
-	// glyphs. It is most noticable in FreeSansBold.ttf, where otherwise the
+	// glyphs. It is most noticeable in FreeSansBold.ttf, where otherwise the
 	// 't' glyph looks like it is cut off on the right side.
 	if (FT_Load_Glyph(_face, slot, _loadFlags))
 		return false;
diff --git a/gui/gui-manager.cpp b/gui/gui-manager.cpp
index 53ce1521d02..11447df0ce6 100644
--- a/gui/gui-manager.cpp
+++ b/gui/gui-manager.cpp
@@ -488,7 +488,7 @@ void GuiManager::runLoop() {
 
 	// WORKAROUND: When quitting we might not properly close the dialogs on
 	// the dialog stack, thus we do this here to avoid any problems.
-	// This is most noticable in bug #5954 "LAUNCHER: Can't quit from unsupported game dialog".
+	// This is most noticeable in bug #5954 "LAUNCHER: Can't quit from unsupported game dialog".
 	// It seems that Dialog::runModal never removes the dialog from the dialog
 	// stack, thus if the dialog does not call Dialog::close to close itself
 	// it will never be removed. Since we can have multiple run loops being
diff --git a/test/cxxtest/TODO b/test/cxxtest/TODO
index 63afa6896ae..2921f5c076f 100644
--- a/test/cxxtest/TODO
+++ b/test/cxxtest/TODO
@@ -8,7 +8,7 @@ It is not meant to be "human readable".
 Write some mocks
 
 *** Distribution
-Seperate packages (w/ binaries)?  How would that be used?
+Separate packages (w/ binaries)?  How would that be used?
 For Windows: .lib for "Real" and "Mock" parts.
 For Linux: Maybe. Different compilers etc.
 So probably only source release with Makefiles and .ds[pw]?  Or just Win32 binary.