Fix: Some typos found using codespell

93 files changed, 142 insertions, 142 deletions

diff --git a/src/aircraft_cmd.cpp b/src/aircraft_cmd.cpp
index 5cb350404..aa830fa14 100644
--- a/src/aircraft_cmd.cpp
+++ b/src/aircraft_cmd.cpp
@@ -1815,7 +1815,7 @@ static bool AirportHasBlock(Aircraft *v, const AirportFTA *current_pos, const Ai
  * "reserve" a block for the plane
  * @param v airplane that requires the operation
  * @param current_pos of the vehicle in the list of blocks
- * @param apc airport on which block is requsted to be set
+ * @param apc airport on which block is requested to be set
  * @returns true on success. Eg, next block was free and we have occupied it
  */
 static bool AirportSetBlocks(Aircraft *v, const AirportFTA *current_pos, const AirportFTAClass *apc)
diff --git a/src/autoreplace_cmd.cpp b/src/autoreplace_cmd.cpp
index 99f14f218..7c43f9e7a 100644
--- a/src/autoreplace_cmd.cpp
+++ b/src/autoreplace_cmd.cpp
@@ -582,7 +582,7 @@ static CommandCost ReplaceChain(Vehicle **chain, DoCommandFlag flags, bool wagon
 					if ((flags & DC_EXEC) != 0) TransferCargo(w, new_head, true);
 
 					/* Sell the vehicle.
-					 * Note: This might temporarly construct new trains, so use DC_AUTOREPLACE to prevent
+					 * Note: This might temporarily construct new trains, so use DC_AUTOREPLACE to prevent
 					 *       it from failing due to engine limits. */
 					cost.AddCost(DoCommand(0, w->index, 0, flags | DC_AUTOREPLACE, GetCmdSellVeh(w)));
 					if ((flags & DC_EXEC) != 0) {
diff --git a/src/blitter/32bpp_anim.cpp b/src/blitter/32bpp_anim.cpp
index 293ebb173..af2755cd7 100644
--- a/src/blitter/32bpp_anim.cpp
+++ b/src/blitter/32bpp_anim.cpp
@@ -42,7 +42,7 @@ inline void Blitter_32bppAnim::Draw(const Blitter::BlitterParams *bp, ZoomLevel
 	Colour *dst = (Colour *)bp->dst + bp->top * bp->pitch + bp->left;
 	uint16 *anim = this->anim_buf + this->ScreenToAnimOffset((uint32 *)bp->dst) + bp->top * this->anim_buf_pitch + bp->left;
 
-	const byte *remap = bp->remap; // store so we don't have to access it via bp everytime
+	const byte *remap = bp->remap; // store so we don't have to access it via bp every time
 
 	for (int y = 0; y < bp->height; y++) {
 		Colour *dst_ln = dst + bp->pitch;
diff --git a/src/blitter/32bpp_optimized.cpp b/src/blitter/32bpp_optimized.cpp
index cc056f5b5..c6fa762e5 100644
--- a/src/blitter/32bpp_optimized.cpp
+++ b/src/blitter/32bpp_optimized.cpp
@@ -48,7 +48,7 @@ inline void Blitter_32bppOptimized::Draw(const Blitter::BlitterParams *bp, ZoomL
 	/* skip lines in dst */
 	Colour *dst = (Colour *)bp->dst + bp->top * bp->pitch + bp->left;
 
-	/* store so we don't have to access it via bp everytime (compiler assumes pointer aliasing) */
+	/* store so we don't have to access it via bp every time (compiler assumes pointer aliasing) */
 	const byte *remap = bp->remap;
 
 	for (int y = 0; y < bp->height; y++) {
@@ -66,7 +66,7 @@ inline void Blitter_32bppOptimized::Draw(const Blitter::BlitterParams *bp, ZoomL
 		/* we will end this line when we reach this point */
 		Colour *dst_end = dst + bp->skip_left;
 
-		/* number of pixels with the same aplha channel class */
+		/* number of pixels with the same alpha channel class */
 		uint n;
 
 		while (dst < dst_end) {
diff --git a/src/bmp.h b/src/bmp.h
index cf2b538f3..adfbfa5fe 100644
--- a/src/bmp.h
+++ b/src/bmp.h
@@ -15,7 +15,7 @@
 #include "gfx_type.h"
 
 struct BmpInfo {
-	uint32 offset;       ///< offset of bitmap data from .bmp file begining
+	uint32 offset;       ///< offset of bitmap data from .bmp file beginning
 	uint32 width;        ///< bitmap width
 	uint32 height;       ///< bitmap height
 	bool os2_bmp;        ///< true if OS/2 1.x or windows 2.x bitmap
diff --git a/src/cargoaction.cpp b/src/cargoaction.cpp
index afc1b0fff..73908d339 100644
--- a/src/cargoaction.cpp
+++ b/src/cargoaction.cpp
@@ -162,7 +162,7 @@ bool CargoReturn::operator()(CargoPacket *cp)
 
 /**
  * Transfers some cargo from a vehicle to a station.
- * @param cp Packet to be transfered.
+ * @param cp Packet to be transferred.
  * @return True if the packet was completely reserved, false if part of it was.
  */
 bool CargoTransfer::operator()(CargoPacket *cp)
diff --git a/src/cargopacket.cpp b/src/cargopacket.cpp
index 2147783c8..846af4680 100644
--- a/src/cargopacket.cpp
+++ b/src/cargopacket.cpp
@@ -395,7 +395,7 @@ void VehicleCargoList::AgeCargo()
 }
 
 /**
- * Sets loaded_at_xy to the current station for all cargo to be transfered.
+ * Sets loaded_at_xy to the current station for all cargo to be transferred.
  * This is done when stopping or skipping while the vehicle is unloading. In
  * that case the vehicle will get part of its transfer credits early and it may
  * get more transfer credits than it's entitled to.
diff --git a/src/cargopacket.h b/src/cargopacket.h
index 0e2a1bc97..4eda6a79a 100644
--- a/src/cargopacket.h
+++ b/src/cargopacket.h
@@ -286,7 +286,7 @@ protected:
 	typedef CargoList<VehicleCargoList, CargoPacketList> Parent;
 
 	Money feeder_share;                     ///< Cache for the feeder share.
-	uint action_counts[NUM_MOVE_TO_ACTION]; ///< Counts of cargo to be transfered, delivered, kept and loaded.
+	uint action_counts[NUM_MOVE_TO_ACTION]; ///< Counts of cargo to be transferred, delivered, kept and loaded.
 
 	template<class Taction>
 	void ShiftCargo(Taction action);
diff --git a/src/command.cpp b/src/command.cpp
index c4d3fa7ce..66509cf30 100644
--- a/src/command.cpp
+++ b/src/command.cpp
@@ -554,7 +554,7 @@ bool DoCommandP(const CommandContainer *container, bool my_cmd)
 bool DoCommandP(TileIndex tile, uint32 p1, uint32 p2, uint32 cmd, CommandCallback *callback, const char *text, bool my_cmd)
 {
 	/* Cost estimation is generally only done when the
-	 * local user presses shift while doing somthing.
+	 * local user presses shift while doing something.
 	 * However, in case of incoming network commands,
 	 * map generation or the pause button we do want
 	 * to execute. */
diff --git a/src/console_cmds.cpp b/src/console_cmds.cpp
index 13784178f..cdc6c10e0 100644
--- a/src/console_cmds.cpp
+++ b/src/console_cmds.cpp
@@ -249,7 +249,7 @@ DEF_CONSOLE_CMD(ConResetTile)
  * Scroll to a tile on the map.
  * param x tile number or tile x coordinate.
  * param y optional y coordinate.
- * @note When only one argument is given it is intepreted as the tile number.
+ * @note When only one argument is given it is interpreted as the tile number.
  *       When two arguments are given, they are interpreted as the tile's x
  *       and y coordinates.
  * @return True when either console help was shown or a proper amount of parameters given.
diff --git a/src/console_gui.cpp b/src/console_gui.cpp
index 2cb02ff56..916a2ec74 100644
--- a/src/console_gui.cpp
+++ b/src/console_gui.cpp
@@ -281,7 +281,7 @@ struct IConsoleWindow : Window
 
 			case WKC_RETURN: case WKC_NUM_ENTER: {
 				/* We always want the ] at the left side; we always force these strings to be left
-				 * aligned anyway. So enforce this in all cases by addding a left-to-right marker,
+				 * aligned anyway. So enforce this in all cases by adding a left-to-right marker,
 				 * otherwise it will be drawn at the wrong side with right-to-left texts. */
 				IConsolePrintF(CC_COMMAND, LRM "] %s", _iconsole_cmdline.buf);
 				const char *cmd = IConsoleHistoryAdd(_iconsole_cmdline.buf);
diff --git a/src/core/pool_type.hpp b/src/core/pool_type.hpp
index 61dd29213..8102d580c 100644
--- a/src/core/pool_type.hpp
+++ b/src/core/pool_type.hpp
@@ -7,7 +7,7 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** @file pool_type.hpp Defintion of Pool, structure used to access PoolItems, and PoolItem, base structure for Vehicle, Town, and other indexed items. */
+/** @file pool_type.hpp Definition of Pool, structure used to access PoolItems, and PoolItem, base structure for Vehicle, Town, and other indexed items. */
 
 #ifndef POOL_TYPE_HPP
 #define POOL_TYPE_HPP
diff --git a/src/debug.h b/src/debug.h
index 3faefffaf..337fe8639 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -85,7 +85,7 @@ const char *GetDebugString();
  * TIC() / TOC() creates its own block, so make sure not the mangle
  *  it with another block.
  *
- * The output is counted in CPU cycles, and not comparable accross
+ * The output is counted in CPU cycles, and not comparable across
  *  machines. Mainly useful for local optimisations.
  **/
 #define TIC() {\
diff --git a/src/depend/depend.cpp b/src/depend/depend.cpp
index 5f95ffc42..9321e573b 100644
--- a/src/depend/depend.cpp
+++ b/src/depend/depend.cpp
@@ -292,7 +292,7 @@ public:
 	}
 
 	/**
-	 * Read the currenty processed string.
+	 * Read the currently processed string.
 	 * @return the string, can be nullptr.
 	 */
 	const char *GetString() const
diff --git a/src/economy.cpp b/src/economy.cpp
index b6778f9e5..e8fbea094 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -1706,7 +1706,7 @@ static void LoadUnloadVehicle(Vehicle *front)
 				dirty_station = true;
 
 				if (!ge->HasRating()) {
-					/* Upon transfering cargo, make sure the station has a rating. Fake a pickup for the
+					/* Upon transferring cargo, make sure the station has a rating. Fake a pickup for the
 					 * first unload to prevent the cargo from quickly decaying after the initial drop. */
 					ge->time_since_pickup = 0;
 					SetBit(ge->status, GoodsEntry::GES_RATING);
diff --git a/src/fontcache.cpp b/src/fontcache.cpp
index c29c868e5..d63b90e86 100644
--- a/src/fontcache.cpp
+++ b/src/fontcache.cpp
@@ -978,7 +978,7 @@ static void LoadWin32Font(FontSize fs)
 
 		if (AddFontResourceEx(fontPath, FR_PRIVATE, 0) != 0) {
 			/* Try a nice little undocumented function first for getting the internal font name.
-			 * Some documentation is fount at: http://www.undocprint.org/winspool/getfontresourceinfo */
+			 * Some documentation is found at: http://www.undocprint.org/winspool/getfontresourceinfo */
 			typedef BOOL(WINAPI * PFNGETFONTRESOURCEINFO)(LPCTSTR, LPDWORD, LPVOID, DWORD);
 #ifdef UNICODE
 			static PFNGETFONTRESOURCEINFO GetFontResourceInfo = (PFNGETFONTRESOURCEINFO)GetProcAddress(GetModuleHandle(_T("Gdi32")), "GetFontResourceInfoW");
diff --git a/src/fontdetection.cpp b/src/fontdetection.cpp
index 7b2a6756c..75806c8fe 100644
--- a/src/fontdetection.cpp
+++ b/src/fontdetection.cpp
@@ -399,7 +399,7 @@ FT_Error GetFontByFaceName(const char *font_name, FT_Face *face)
 #if (MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6)
 	if (MacOSVersionIsAtLeast(10, 6, 0)) {
 		/* Simply creating the font using CTFontCreateWithNameAndSize will *always* return
-		 * something, no matter the name. As such, we can't use it to check for existance.
+		 * something, no matter the name. As such, we can't use it to check for existence.
 		 * We instead query the list of all font descriptors that match the given name which
 		 * does not do this stupid name fallback. */
 		CTFontDescriptorRef name_desc = CTFontDescriptorCreateWithNameAndSize(name, 0.0);
diff --git a/src/framerate_gui.cpp b/src/framerate_gui.cpp
index 10014b4f4..5c54eed5b 100644
--- a/src/framerate_gui.cpp
+++ b/src/framerate_gui.cpp
@@ -918,7 +918,7 @@ struct FrametimeGraphWindow : Window {
 					}
 				}
 			}
-			/* Draw divison lines and labels for the horizontal axis */
+			/* Draw division lines and labels for the horizontal axis */
 			for (uint division = horz_divisions; division > 0; division--) {
 				int x = Scinterlate(x_zero, x_max, 0, (int)horz_divisions, (int)horz_divisions - (int)division);
 				GfxDrawLine(x, y_max, x, y_zero, c_grid);
diff --git a/src/gfx.cpp b/src/gfx.cpp
index 4fd705b9f..6814165d4 100644
--- a/src/gfx.cpp
+++ b/src/gfx.cpp
@@ -212,7 +212,7 @@ static inline void GfxDoDrawLine(void *video, int x, int y, int x2, int y2, int
 	 * work the blitter has to do by shortening the effective line segment.
 	 * However, in order to get that right and prevent the flickering effects
 	 * of rounding errors so much additional code has to be run here that in
-	 * the general case the effect is not noticable. */
+	 * the general case the effect is not noticeable. */
 
 	blitter->DrawLine(video, x, y, x2, y2, screen_width, screen_height, colour, width, dash);
 }
@@ -1669,7 +1669,7 @@ bool CursorVars::UpdateCursorPosition(int x, int y, bool queued_warp)
 		if (this->delta.x != 0 || this->delta.y != 0) {
 			/* Trigger warp.
 			 * Note: We also trigger warping again, if there is already a pending warp.
-			 *       This makes it more tolerant about the OS or other software inbetween
+			 *       This makes it more tolerant about the OS or other software in between
 			 *       botchering the warp. */
 			this->queued_warp = queued_warp;
 			need_warp = true;
diff --git a/src/gfx_func.h b/src/gfx_func.h
index 1724a931f..7b6529564 100644
--- a/src/gfx_func.h
+++ b/src/gfx_func.h
@@ -31,7 +31,7 @@
  * VideoDriver::MakeDirty and it is truncated back to an empty rectangle. At some
  * later point (which is uninteresting, too) the video driver
  * repaints all these saved rectangle instead of the whole screen and drop the
- * rectangle informations. Then a new round begins by marking objects "dirty".
+ * rectangle information. Then a new round begins by marking objects "dirty".
  *
  * @see VideoDriver::MakeDirty
  * @see _invalid_rect
diff --git a/src/ground_vehicle.cpp b/src/ground_vehicle.cpp
index c269aeb79..a7869d958 100644
--- a/src/ground_vehicle.cpp
+++ b/src/ground_vehicle.cpp
@@ -116,7 +116,7 @@ int GroundVehicle<T, Type>::GetAcceleration() const
 
 	/* Power is stored in HP, we need it in watts.
 	 * Each vehicle can have U16 power, 128 vehicles, HP -> watt
-	 * and km/h to m/s conversion below result in a maxium of
+	 * and km/h to m/s conversion below result in a maximum of
 	 * about 1.1E11, way more than 4.3E9 of int32. */
 	int64 power = this->gcache.cached_power * 746ll;
 
diff --git a/src/landscape.cpp b/src/landscape.cpp
index 66be73bd6..0d5df5f87 100644
--- a/src/landscape.cpp
+++ b/src/landscape.cpp
@@ -352,8 +352,8 @@ int GetSlopePixelZ(int x, int y)
  * Return world \c z coordinate of a given point of a tile,
  * also for tiles outside the map (virtual "black" tiles).
  *
- * @param x World X coordinate in tile "units", may be ouside the map.
- * @param y World Y coordinate in tile "units", may be ouside the map.
+ * @param x World X coordinate in tile "units", may be outside the map.
+ * @param y World Y coordinate in tile "units", may be outside the map.
  * @return World Z coordinate at tile ground level, including slopes and foundations.
  */
 int GetSlopePixelZOutsideMap(int x, int y)
diff --git a/src/linkgraph/demands.h b/src/linkgraph/demands.h
index 8a639b8b1..6fe376834 100644
--- a/src/linkgraph/demands.h
+++ b/src/linkgraph/demands.h
@@ -23,7 +23,7 @@ private:
 };
 
 /**
- * Stateless, thread safe demand hander. Doesn't do anything but call DemandCalculator.
+ * Stateless, thread safe demand handler. Doesn't do anything but call DemandCalculator.
  */
 class DemandHandler : public ComponentHandler {
 public:
diff --git a/src/linkgraph/init.h b/src/linkgraph/init.h
index a39a0f820..377c88631 100644
--- a/src/linkgraph/init.h
+++ b/src/linkgraph/init.h
@@ -6,7 +6,7 @@
 #include "linkgraphjob_base.h"
 
 /**
- * Stateless, thread safe initialization hander. Initializes node and edge
+ * Stateless, thread safe initialization handler. Initializes node and edge
  * annotations.
  */
 class InitHandler : public ComponentHandler {
diff --git a/src/linkgraph/linkgraphjob.cpp b/src/linkgraph/linkgraphjob.cpp
index cf180a3ae..cd358f37f 100644
--- a/src/linkgraph/linkgraphjob.cpp
+++ b/src/linkgraph/linkgraphjob.cpp
@@ -62,7 +62,7 @@ void LinkGraphJob::SpawnThread()
 {
 	if (!StartNewThread(&this->thread, "ottd:linkgraph", &(LinkGraphSchedule::Run), this)) {
 		/* Of course this will hang a bit.
-		 * On the other hand, if you want to play games which make this hang noticably
+		 * On the other hand, if you want to play games which make this hang noticeably
 		 * on a platform without threads then you'll probably get other problems first.
 		 * OK:
 		 * If someone comes and tells me that this hangs for him/her, I'll implement a
diff --git a/src/linkgraph/linkgraphjob.h b/src/linkgraph/linkgraphjob.h
index a20a2025c..fa6ca618a 100644
--- a/src/linkgraph/linkgraphjob.h
+++ b/src/linkgraph/linkgraphjob.h
@@ -415,7 +415,7 @@ public:
 protected:
 
 	/**
-	 * Some boundaries to clamp agains in order to avoid integer overflows.
+	 * Some boundaries to clamp against in order to avoid integer overflows.
 	 */
 	enum PathCapacityBoundaries {
 		PATH_CAP_MULTIPLIER = 16,
diff --git a/src/linkgraph/refresh.cpp b/src/linkgraph/refresh.cpp
index b749d2718..ef10de6fe 100644
--- a/src/linkgraph/refresh.cpp
+++ b/src/linkgraph/refresh.cpp
@@ -250,7 +250,7 @@ void LinkRefresher::RefreshStats(const Order *cur, const Order *next)
 /**
  * Iterate over orders starting at \a cur and \a next and refresh links
  * associated with them. \a cur and \a next can be equal. If they're not they
- * must be "neigbours" in their order list, which means \a next must be directly
+ * must be "neighbours" in their order list, which means \a next must be directly
  * reachable from \a cur without passing any further OT_GOTO_STATION or
  * OT_IMPLICIT orders in between.
  * @param cur Current order being evaluated.
diff --git a/src/misc/blob.hpp b/src/misc/blob.hpp
index e725ccd27..fafeb8078 100644
--- a/src/misc/blob.hpp
+++ b/src/misc/blob.hpp
@@ -154,13 +154,13 @@ protected:
 		header = &src[1];
 	}
 
-	/** blob header accessor - use it rather than using the pointer arithmetics directly - non-const version */
+	/** blob header accessor - use it rather than using the pointer arithmetic directly - non-const version */
 	inline BlobHeader& Hdr()
 	{
 		return *(header - 1);
 	}
 
-	/** blob header accessor - use it rather than using the pointer arithmetics directly - const version */
+	/** blob header accessor - use it rather than using the pointer arithmetic directly - const version */
 	inline const BlobHeader& Hdr() const
 	{
 		return *(header - 1);
diff --git a/src/misc/countedptr.hpp b/src/misc/countedptr.hpp
index 83d0e036d..1364197dc 100644
--- a/src/misc/countedptr.hpp
+++ b/src/misc/countedptr.hpp
@@ -53,7 +53,7 @@ public:
 	}
 
 protected:
-	/** add one ref to the underlaying object */
+	/** add one ref to the underlying object */
 	inline void AddRef()
 	{
 		if (m_pT != nullptr) m_pT->AddRef();
diff --git a/src/misc/str.hpp b/src/misc/str.hpp
index 1d9802288..42e463158 100644
--- a/src/misc/str.hpp
+++ b/src/misc/str.hpp
@@ -7,7 +7,7 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** @file str.hpp String formating? */
+/** @file str.hpp String formatting? */
 
 #ifndef STR_HPP
 #define STR_HPP
@@ -91,7 +91,7 @@ struct CStrA : public CBlobT<char>
 		return strcmp(base::Data(), other.Data()) < 0;
 	}
 
-	/** Add formated string (like vsprintf) at the end of existing contents. */
+	/** Add formatted string (like vsprintf) at the end of existing contents. */
 	int AddFormatL(const char *format, va_list args)
 	{
 		size_t addSize = max<size_t>(strlen(format), 16);
@@ -126,7 +126,7 @@ struct CStrA : public CBlobT<char>
 		return ret;
 	}
 
-	/** Add formated string (like sprintf) at the end of existing contents. */
+	/** Add formatted string (like sprintf) at the end of existing contents. */
 	int CDECL WARN_FORMAT(2, 3) AddFormat(const char *format, ...)
 	{
 		va_list args;
@@ -136,7 +136,7 @@ struct CStrA : public CBlobT<char>
 		return ret;
 	}
 
-	/** Assign formated string (like sprintf). */
+	/** Assign formatted string (like sprintf). */
 	int CDECL WARN_FORMAT(2, 3) Format(const char *format, ...)
 	{
 		base::Free();
diff --git a/src/misc_cmd.cpp b/src/misc_cmd.cpp
index 4271f5758..e00ad9d9c 100644
--- a/src/misc_cmd.cpp
+++ b/src/misc_cmd.cpp
@@ -228,7 +228,7 @@ CommandCost CmdChangeBankBalance(TileIndex tile, DoCommandFlag flags, uint32 p1,
 		cur_company.Restore();
 	}
 
-	/* This command doesn't cost anyting for deity. */
+	/* This command doesn't cost anything for deity. */
 	CommandCost zero_cost(expenses_type, 0);
 	return zero_cost;
 }
diff --git a/src/music/cocoa_m.cpp b/src/music/cocoa_m.cpp
index c27a0a092..fd3ff295e 100644
--- a/src/music/cocoa_m.cpp
+++ b/src/music/cocoa_m.cpp
@@ -114,7 +114,7 @@ const char *MusicDriver_Cocoa::Start(const char * const *parm)
 
 
 /**
- * Checks wether the player is active.
+ * Checks whether the player is active.
  */
 bool MusicDriver_Cocoa::IsSongPlaying()
 {
diff --git a/src/music/dmusic.cpp b/src/music/dmusic.cpp
index 7236e89f7..c175b0727 100644
--- a/src/music/dmusic.cpp
+++ b/src/music/dmusic.cpp
@@ -234,7 +234,7 @@ bool DLSFile::ReadDLSRegion(FILE *f, DWORD list_length, std::vector<DLSRegion> &
 				break;
 
 			default:
-				DEBUG(driver, 7, "DLS: Ignoring unkown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
 				fseek(f, chunk.length, SEEK_CUR);
 				break;
 		}
@@ -257,7 +257,7 @@ bool DLSFile::ReadDLSRegionList(FILE *f, DWORD list_length, DLSInstrument &instr
 			if (list_type == FOURCC_RGN) {
 				this->ReadDLSRegion(f, chunk.length - sizeof(list_type), instrument.regions);
 			} else {
-				DEBUG(driver, 7, "DLS: Ignoring unkown list chunk of type %c%c%c%c", (char)(list_type & 0xFF), (char)((list_type >> 8) & 0xFF), (char)((list_type >> 16) & 0xFF), (char)((list_type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown list chunk of type %c%c%c%c", (char)(list_type & 0xFF), (char)((list_type >> 8) & 0xFF), (char)((list_type >> 16) & 0xFF), (char)((list_type >> 24) & 0xFF));
 				fseek(f, chunk.length - sizeof(list_type), SEEK_CUR);
 			}
 		} else {
@@ -304,7 +304,7 @@ bool DLSFile::ReadDLSInstrument(FILE *f, DWORD list_length)
 				break;
 
 			default:
-				DEBUG(driver, 7, "DLS: Ignoring unkown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
 				fseek(f, chunk.length, SEEK_CUR);
 				break;
 		}
@@ -329,7 +329,7 @@ bool DLSFile::ReadDLSInstrumentList(FILE *f, DWORD list_length)
 
 				if (!this->ReadDLSInstrument(f, chunk.length - sizeof(list_type))) return false;
 			} else {
-				DEBUG(driver, 7, "DLS: Ignoring unkown list chunk of type %c%c%c%c", (char)(list_type & 0xFF), (char)((list_type >> 8) & 0xFF), (char)((list_type >> 16) & 0xFF), (char)((list_type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown list chunk of type %c%c%c%c", (char)(list_type & 0xFF), (char)((list_type >> 8) & 0xFF), (char)((list_type >> 16) & 0xFF), (char)((list_type >> 24) & 0xFF));
 				fseek(f, chunk.length - sizeof(list_type), SEEK_CUR);
 			}
 		} else {
@@ -392,7 +392,7 @@ bool DLSFile::ReadDLSWave(FILE *f, DWORD list_length, long offset)
 				break;
 
 			default:
-				DEBUG(driver, 7, "DLS: Ignoring unkown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
 				fseek(f, chunk.length, SEEK_CUR);
 				break;
 		}
@@ -421,7 +421,7 @@ bool DLSFile::ReadDLSWaveList(FILE *f, DWORD list_length)
 
 				if (!this->ReadDLSWave(f, chunk.length - sizeof(list_type), chunk_offset - base_offset)) return false;
 			} else {
-				DEBUG(driver, 7, "DLS: Ignoring unkown list chunk of type %c%c%c%c", (char)(list_type & 0xFF), (char)((list_type >> 8) & 0xFF), (char)((list_type >> 16) & 0xFF), (char)((list_type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown list chunk of type %c%c%c%c", (char)(list_type & 0xFF), (char)((list_type >> 8) & 0xFF), (char)((list_type >> 16) & 0xFF), (char)((list_type >> 24) & 0xFF));
 				fseek(f, chunk.length - sizeof(list_type), SEEK_CUR);
 			}
 		} else {
@@ -500,7 +500,7 @@ bool DLSFile::LoadFile(const TCHAR *file)
 				break;
 
 			default:
-				DEBUG(driver, 7, "DLS: Ignoring unkown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
+				DEBUG(driver, 7, "DLS: Ignoring unknown chunk %c%c%c%c", (char)(chunk.type & 0xFF), (char)((chunk.type >> 8) & 0xFF), (char)((chunk.type >> 16) & 0xFF), (char)((chunk.type >> 24) & 0xFF));
 				fseek(f, chunk.length, SEEK_CUR);
 				break;
 		}
diff --git a/src/music/qtmidi.cpp b/src/music/qtmidi.cpp
index eb032e950..e612604ed 100644
--- a/src/music/qtmidi.cpp
+++ b/src/music/qtmidi.cpp
@@ -156,7 +156,7 @@ static void InitQuickTimeIfNeeded()
 	if (_quicktime_started) return;
 
 	DEBUG(driver, 2, "qtmidi: initializing Quicktime");
-	/* Be polite: check wether QuickTime is available and initialize it. */
+	/* Be polite: check whether QuickTime is available and initialize it. */
 	_quicktime_started =
 		(noErr == Gestalt(gestaltQuickTime, &dummy)) &&
 		(noErr == EnterMovies());
@@ -215,7 +215,7 @@ bool MusicDriver_QtMidi::IsSongPlaying()
 
 		case QT_STATE_PLAY:
 			MoviesTask(_quicktime_movie, 0);
-			/* Check wether movie ended. */
+			/* Check whether movie ended. */
 			if (IsMovieDone(_quicktime_movie) ||
 					(GetMovieTime(_quicktime_movie, nullptr) >=
 					 GetMovieDuration(_quicktime_movie))) {
diff --git a/src/network/network_content.cpp b/src/network/network_content.cpp
index 762a8c308..b6d32620b 100644
--- a/src/network/network_content.cpp
+++ b/src/network/network_content.cpp
@@ -133,7 +133,7 @@ bool ClientNetworkContentSocketHandler::Receive_SERVER_INFO(Packet *p)
 		ci->state = ContentInfo::UNSELECTED;
 	}
 
-	/* Something we don't have and has filesize 0 does not exist in te system */
+	/* Something we don't have and has filesize 0 does not exist in the system */
 	if (ci->state == ContentInfo::UNSELECTED && ci->filesize == 0) ci->state = ContentInfo::DOES_NOT_EXIST;
 
 	/* Do we already have a stub for this? */
@@ -774,7 +774,7 @@ void ClientNetworkContentSocketHandler::SendReceive()
 
 	if (this->CanSendReceive()) {
 		if (this->ReceivePackets()) {
-			/* Only update activity once a packet is received, instead of everytime we try it. */
+			/* Only update activity once a packet is received, instead of every time we try it. */
 			this->lastActivity = _realtime_tick;
 		}
 	}
diff --git a/src/network/network_content_gui.cpp b/src/network/network_content_gui.cpp
index 875a5b77c..9c58564e7 100644
--- a/src/network/network_content_gui.cpp
+++ b/src/network/network_content_gui.cpp
@@ -289,7 +289,7 @@ struct ContentListFilterData {
 	std::bitset<CONTENT_TYPE_END> types; ///< Content types displayed
 };
 
-/** Filter criterias for NetworkContentListWindow. */
+/** Filter criteria for NetworkContentListWindow. */
 enum ContentListFilterCriteria {
 	CONTENT_FILTER_TEXT = 0,        ///< Filter by query sting
 	CONTENT_FILTER_TYPE_OR_SELECTED,///< Filter by being of displayed type or selected for download
diff --git a/src/network/network_gui.cpp b/src/network/network_gui.cpp
index 6486f4531..e14bc36cc 100644
--- a/src/network/network_gui.cpp
+++ b/src/network/network_gui.cpp
@@ -238,7 +238,7 @@ protected:
 
 	int lock_offset; ///< Left offset for lock icon.
 	int blot_offset; ///< Left offset for green/yellow/red compatibility icon.
-	int flag_offset; ///< Left offset for langauge flag icon.
+	int flag_offset; ///< Left offset for language flag icon.
 
 	/**
 	 * (Re)build the GUI network game list (a.k.a. this->servers) as some
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp
index 24b91e89b..6d9dcc3d8 100644
--- a/src/network/network_server.cpp
+++ b/src/network/network_server.cpp
@@ -1206,7 +1206,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_ACK(Packet *p)
 
 	/* The client is trying to catch up with the server */
 	if (this->status == STATUS_PRE_ACTIVE) {
-		/* The client is not yet catched up? */
+		/* The client is not yet caught up? */
 		if (frame + DAY_TICKS < _frame_counter) return NETWORK_RECV_STATUS_OKAY;
 
 		/* Now he is! Unpause the game */
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 82279ab99..1f7167b35 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -104,7 +104,7 @@ public:
 	byte grf_container_ver;   ///< Container format of the current GRF file.
 
 	/* Kind of return values when processing certain actions */
-	int skip_sprites;         ///< Number of psuedo sprites to skip before processing the next one. (-1 to skip to end of file)
+	int skip_sprites;         ///< Number of pseudo sprites to skip before processing the next one. (-1 to skip to end of file)
 
 	/* Currently referenceable spritegroups */
 	SpriteGroup *spritegroups[MAX_SPRITEGROUP + 1];
@@ -550,7 +550,7 @@ StringID MapGRFStringID(uint32 grfid, StringID str)
 {
 	if (IsInsideMM(str, 0xD800, 0xE000)) {
 		/* General text provided by NewGRF.
-		 * In the specs this is called the 0xDCxx range (misc presistent texts),
+		 * In the specs this is called the 0xDCxx range (misc persistent texts),
 		 * but we meanwhile extended the range to 0xD800-0xDFFF.
 		 * Note: We are not involved in the "persistent" business, since we do not store
 		 * any NewGRF strings in savegames. */
@@ -843,7 +843,7 @@ static void ReadSpriteLayoutRegisters(ByteReader *buf, TileLayoutFlags flags, bo
  * @param num_building_sprites Number of building sprites to read
  * @param use_cur_spritesets   Whether to use currently referenceable action 1 sets.
  * @param feature              GrfSpecFeature to use spritesets from.
- * @param allow_var10          Whether the spritelayout may specifiy var10 values for resolving multiple action-1-2-3 chains
+ * @param allow_var10          Whether the spritelayout may specify var10 values for resolving multiple action-1-2-3 chains
  * @param no_z_position        Whether bounding boxes have no Z offset
  * @param dts                  Layout container to output into
  * @return True on error (GRF was disabled).
@@ -3460,7 +3460,7 @@ static ChangeInfoResult IndustriesChangeInfo(uint indid, int numinfo, int prop,
 					indsp->grf_prop.local_id = indid + i;
 					indsp->grf_prop.subst_id = subs_id;
 					indsp->grf_prop.grffile = _cur.grffile;
-					/* If the grf industry needs to check its surounding upon creation, it should
+					/* If the grf industry needs to check its surrounding upon creation, it should
 					 * rely on callbacks, not on the original placement functions */
 					indsp->check_proc = CHECK_NOTHING;
 				}
@@ -6205,7 +6205,7 @@ static void GraphicsNew(ByteReader *buf)
 		return;
 	}
 
-	/* Load at most max_sprites sprites. Skip remaining sprites. (for compatibility with TTDP and future extentions) */
+	/* Load at most max_sprites sprites. Skip remaining sprites. (for compatibility with TTDP and future extensions) */
 	uint16 skip_num = SanitizeSpriteOffset(num, offset, action5_type->max_sprites, action5_type->name);
 	SpriteID replace = action5_type->sprite_base + offset;
 
@@ -6825,7 +6825,7 @@ static void GRFLoadError(ByteReader *buf)
 {
 	/* <0B> <severity> <language-id> <message-id> [<message...> 00] [<data...>] 00 [<parnum>]
 	 *
-	 * B severity      00: notice, contine loading grf file
+	 * B severity      00: notice, continue loading grf file
 	 *                 01: warning, continue loading grf file
 	 *                 02: error, but continue loading grf file, and attempt
 	 *                     loading grf again when loading or starting next game
@@ -7004,7 +7004,7 @@ static uint32 GetPatchVariable(uint8 param)
 		 */
 		case 0x13: {
 			byte map_bits = 0;
-			byte log_X = MapLogX() - 6; // substraction is required to make the minimal size (64) zero based
+			byte log_X = MapLogX() - 6; // subtraction is required to make the minimal size (64) zero based
 			byte log_Y = MapLogY() - 6;
 			byte max_edge = max(log_X, log_Y);
 
@@ -7297,7 +7297,7 @@ static void ParamSet(ByteReader *buf)
 			}
 			break;
 
-		case 0x0A: // Signed divison
+		case 0x0A: // Signed division
 			if (src2 == 0) {
 				res = src1;
 			} else {
@@ -9800,7 +9800,7 @@ void LoadNewGRF(uint load_index, uint file_index, uint num_baseset)
 	/*
 	 * Reset the status of all files, so we can 'retry' to load them.
 	 * This is needed when one for example rearranges the NewGRFs in-game
-	 * and a previously disabled NewGRF becomes useable. If it would not
+	 * and a previously disabled NewGRF becomes usable. If it would not
 	 * be reset, the NewGRF would remain disabled even though it should
 	 * have been enabled.
 	 */
diff --git a/src/newgrf.h b/src/newgrf.h
index 5d76a3364..4adcae9b8 100644
--- a/src/newgrf.h
+++ b/src/newgrf.h
@@ -141,7 +141,7 @@ struct GRFFile : ZeroedMemoryAllocator {
 
 	struct LanguageMap *language_map; ///< Mappings related to the languages.
 
-	int traininfo_vehicle_pitch;  ///< Vertical offset for draing train images in depot GUI and vehicle details
+	int traininfo_vehicle_pitch;  ///< Vertical offset for drawing train images in depot GUI and vehicle details
 	uint traininfo_vehicle_width; ///< Width (in pixels) of a 8/8 train vehicle in depot GUI and vehicle details
 
 	uint32 grf_features;                     ///< Bitset of GrfSpecFeature the grf uses
diff --git a/src/newgrf_airport.cpp b/src/newgrf_airport.cpp
index 8ec390a4f..e654dcc78 100644
--- a/src/newgrf_airport.cpp
+++ b/src/newgrf_airport.cpp
@@ -132,7 +132,7 @@ bool AirportSpec::IsAvailable() const
 
 /**
  * Check if the airport would be within the map bounds at the given tile.
- * @param table Selected layout table. This affects airport rotation, and therefore dimenions.
+ * @param table Selected layout table. This affects airport rotation, and therefore dimensions.
  * @param tile Top corner of the airport.
  * @return true iff the airport would be within the map bounds at the given tile.
  */
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index c80f0e350..6a6b4f015 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -650,7 +650,7 @@ void NewGRFSpriteLayout::AllocateRegisters()
 /**
  * Prepares a sprite layout before resolving action-1-2-3 chains.
  * Integrates offsets into the layout and determines which chains to resolve.
- * @note The function uses statically allocated temporary storage, which is reused everytime when calling the function.
+ * @note The function uses statically allocated temporary storage, which is reused every time when calling the function.
  *       That means, you have to use the sprite layout before calling #PrepareLayout() the next time.
  * @param orig_offset          Offset to apply to non-action-1 sprites.
  * @param newgrf_ground_offset Offset to apply to action-1 ground sprites.
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index 955e4ac31..184cb1947 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -248,7 +248,7 @@ static byte MapAircraftMovementState(const Aircraft *v)
 			return AMS_TTDP_TO_INWAY;
 
 		case HELILANDING:
-		case HELIENDLANDING: // Helicoptor is decending.
+		case HELIENDLANDING: // Helicoptor is descending.
 			if (amdflag & AMED_HELI_LOWER) {
 				return afc->delta_z == 0 ?
 					AMS_TTDP_HELI_LAND_AIRPORT : AMS_TTDP_HELI_LAND_HELIPORT;
@@ -1072,7 +1072,7 @@ bool UsesWagonOverride(const Vehicle *v)
  * @param param1   First parameter of the callback
  * @param param2   Second parameter of the callback
  * @param engine   Engine type of the vehicle to evaluate the callback for
- * @param v        The vehicle to evaluate the callback for, or nullptr if it doesnt exist yet
+ * @param v        The vehicle to evaluate the callback for, or nullptr if it doesn't exist yet
  * @return The value the callback returned, or CALLBACK_FAILED if it failed
  */
 uint16 GetVehicleCallback(CallbackID callback, uint32 param1, uint32 param2, EngineID engine, const Vehicle *v)
diff --git a/src/newgrf_text.cpp b/src/newgrf_text.cpp
index 5387d6767..55a1301b1 100644
--- a/src/newgrf_text.cpp
+++ b/src/newgrf_text.cpp
@@ -14,7 +14,7 @@
  * holding everything that the newgrf action 04 will send over to OpenTTD.
  * One of the biggest problems is that Dynamic lang Array uses ISO codes
  * as way to identifying current user lang, while newgrf uses bit shift codes
- * not related to ISO.  So equivalence functionnality had to be set.
+ * not related to ISO.  So equivalence functionality had to be set.
  */
 
 #include "stdafx.h"
diff --git a/src/news_gui.cpp b/src/news_gui.cpp
index 8f3dfaca2..0cf9e9e2a 100644
--- a/src/news_gui.cpp
+++ b/src/news_gui.cpp
@@ -688,9 +688,9 @@ static void MoveToNextNewsItem()
  * @param type news category
  * @param flags display flags for the news
  * @param reftype1 Type of ref1
- * @param ref1     Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleteing the news when the object is deleted.
+ * @param ref1     Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleting the news when the object is deleted.
  * @param reftype2 Type of ref2
- * @param ref2     Reference 2 to some object: Used for scrolling after clicking on the news, and for deleteing the news when the object is deleted.
+ * @param ref2     Reference 2 to some object: Used for scrolling after clicking on the news, and for deleting the news when the object is deleted.
  * @param free_data Pointer to data that must be freed once the news message is cleared
  *
  * @see NewsSubtype
diff --git a/src/news_type.h b/src/news_type.h
index e91b4be3a..0038d0f90 100644
--- a/src/news_type.h
+++ b/src/news_type.h
@@ -128,8 +128,8 @@ struct NewsItem {
 
 	NewsReferenceType reftype1;  ///< Type of ref1
 	NewsReferenceType reftype2;  ///< Type of ref2
-	uint32 ref1;                 ///< Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleteing the news when the object is deleted.
-	uint32 ref2;                 ///< Reference 2 to some object: Used for scrolling after clicking on the news, and for deleteing the news when the object is deleted.
+	uint32 ref1;                 ///< Reference 1 to some object: Used for a possible viewport, scrolling after clicking on the news, and for deleting the news when the object is deleted.
+	uint32 ref2;                 ///< Reference 2 to some object: Used for scrolling after clicking on the news, and for deleting the news when the object is deleted.
 
 	void *free_data;             ///< Data to be freed when the news item has reached its end.
 
diff --git a/src/object_cmd.cpp b/src/object_cmd.cpp
index c6cee00a5..48b6f1f25 100644
--- a/src/object_cmd.cpp
+++ b/src/object_cmd.cpp
@@ -789,7 +789,7 @@ static void ChangeTileOwner_Object(TileIndex tile, Owner old_owner, Owner new_ow
 
 	if (do_clear) {
 		ReallyClearObjectTile(Object::GetByTile(tile));
-		/* When clearing objects, they may turn into canal, which may require transfering ownership. */
+		/* When clearing objects, they may turn into canal, which may require transferring ownership. */
 		ChangeTileOwner(tile, old_owner, new_owner);
 	}
 }
diff --git a/src/order_cmd.cpp b/src/order_cmd.cpp
index 42311a5cd..2c3e4f9a0 100644
--- a/src/order_cmd.cpp
+++ b/src/order_cmd.cpp
@@ -397,7 +397,7 @@ const Order *OrderList::GetNextDecisionNode(const Order *next, uint hops) const
  * @param v The vehicle we're looking at.
  * @param first Order to start searching at or nullptr to start at cur_implicit_order_index + 1.
  * @param hops Number of orders we have already looked at.
- * @return Next stoppping station or INVALID_STATION.
+ * @return Next stopping station or INVALID_STATION.
  * @pre The vehicle is currently loading and v->last_station_visited is meaningful.
  * @note This function may draw a random number. Don't use it from the GUI.
  */
diff --git a/src/os/macosx/osx_stdafx.h b/src/os/macosx/osx_stdafx.h
index 70dc8030c..c3a86092e 100644
--- a/src/os/macosx/osx_stdafx.h
+++ b/src/os/macosx/osx_stdafx.h
@@ -24,7 +24,7 @@
 #define HAVE_OSX_1011_SDK
 #endif
 
-/* It would seem that to ensure backward compability we have to ensure that we have defined MAC_OS_X_VERSION_10_x everywhere */
+/* It would seem that to ensure backward compatibility we have to ensure that we have defined MAC_OS_X_VERSION_10_x everywhere */
 #ifndef MAC_OS_X_VERSION_10_3
 #define MAC_OS_X_VERSION_10_3 1030
 #endif
diff --git a/src/osk_gui.cpp b/src/osk_gui.cpp
index a706a9160..380b1b033 100644
--- a/src/osk_gui.cpp
+++ b/src/osk_gui.cpp
@@ -421,7 +421,7 @@ void ShowOnScreenKeyboard(Window *parent, int button)
  * Updates the original text of the OSK so when the 'parent' changes the
  * original and you press on cancel you won't get the 'old' original text
  * but the updated one.
- * @param parent window that just updated its orignal text
+ * @param parent window that just updated its original text
  * @param button widget number of parent's textbox to update
  */
 void UpdateOSKOriginalText(const Window *parent, int button)
diff --git a/src/pathfinder/npf/npf.cpp b/src/pathfinder/npf/npf.cpp
index f10e4cd9e..1c39a30a0 100644
--- a/src/pathfinder/npf/npf.cpp
+++ b/src/pathfinder/npf/npf.cpp
@@ -998,7 +998,7 @@ static void NPFFollowTrack(AyStar *aystar, OpenListNode *current)
  * When we are looking for one specific target (optionally multiple tiles), we
  * should use a good heuristic to perform aystar search. When we search for
  * multiple targets that are spread around, we should perform a breadth first
- * search by specifiying CalcZero as our heuristic.
+ * search by specifying CalcZero as our heuristic.
  */
 static NPFFoundTargetData NPFRouteInternal(AyStarNode *start1, bool ignore_start_tile1, AyStarNode *start2, bool ignore_start_tile2, NPFFindStationOrTileData *target, AyStar_EndNodeCheck target_proc, AyStar_CalculateH heuristic_proc, AyStarUserData *user, uint reverse_penalty, bool ignore_reserved = false, int max_penalty = 0)
 {
diff --git a/src/querystring_gui.h b/src/querystring_gui.h
index f67809b78..6764a6c91 100644
--- a/src/querystring_gui.h
+++ b/src/querystring_gui.h
@@ -79,7 +79,7 @@ public:
 	/**
 	 * Get the currently marked text.
 	 * @param[out] length Length of the marked text.
-	 * @return Begining of the marked area or nullptr if no text is marked.
+	 * @return Beginning of the marked area or nullptr if no text is marked.
 	 */
 	const char *GetMarkedText(size_t *length) const
 	{
diff --git a/src/road.cpp b/src/road.cpp
index 8c9591ff1..d76d6901c 100644
--- a/src/road.cpp
+++ b/src/road.cpp
@@ -41,9 +41,9 @@ static bool IsPossibleCrossing(const TileIndex tile, Axis ax)
 }
 
 /**
- * Clean up unnecessary RoadBits of a planed tile.
+ * Clean up unnecessary RoadBits of a planned tile.
  * @param tile current tile
- * @param org_rb planed RoadBits
+ * @param org_rb planned RoadBits
  * @return optimised RoadBits
  */
 RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
@@ -96,7 +96,7 @@ RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 				}
 			}
 
-			/* If the neighbor tile is inconnective, remove the planed road connection to it */
+			/* If the neighbor tile is inconnective, remove the planned road connection to it */
 			if (!connective) org_rb ^= target_rb;
 		}
 	}
diff --git a/src/road_gui.cpp b/src/road_gui.cpp
index b215d519f..9a35147e5 100644
--- a/src/road_gui.cpp
+++ b/src/road_gui.cpp
@@ -271,7 +271,7 @@ static bool RoadToolbar_CtrlChanged(Window *w)
 /** Road toolbar window handler. */
 struct BuildRoadToolbarWindow : Window {
 	RoadType roadtype;          ///< Road type to build.
-	const RoadTypeInfo *rti;    ///< Informations about current road type
+	const RoadTypeInfo *rti;    ///< Information about current road type
 	int last_started_action;    ///< Last started user action.
 
 	BuildRoadToolbarWindow(WindowDesc *desc, WindowNumber window_number) : Window(desc)
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index 770237d53..553aab75c 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -231,7 +231,7 @@ void UpdateAllVirtCoords()
  * This is not done directly in AfterLoadGame because these
  * functions require that all saveload conversions have been
  * done. As people tend to add savegame conversion stuff after
- * the intialization of the windows and caches quite some bugs
+ * the initialization of the windows and caches quite some bugs
  * had been made.
  * Moving this out of there is both cleaner and less bug-prone.
  */
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index 83685b46b..aa8acddf1 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -1513,7 +1513,7 @@ bool SlObjectMember(void *ptr, const SaveLoad *sld)
 			break;
 
 		/* SL_WRITEBYTE writes a value to the savegame to identify the type of an object.
-		 * When loading, the value is read explictly with SlReadByte() to determine which
+		 * When loading, the value is read explicitly with SlReadByte() to determine which
 		 * object description to use. */
 		case SL_WRITEBYTE:
 			switch (_sl.action) {
diff --git a/src/saveload/saveload.h b/src/saveload/saveload.h
index 323662f3f..4473a1a82 100644
--- a/src/saveload/saveload.h
+++ b/src/saveload/saveload.h
@@ -267,7 +267,7 @@ enum SaveLoadVersion : uint16 {
 	SLV_186,                                ///< 186   25833 Objects storage
 	SLV_187,                                ///< 187   25899 Linkgraph - restricted flows
 	SLV_188,                                ///< 188   26169 v1.4  FS#5831 Unify RV travel time
-	SLV_189,                                ///< 189   26450 Heirarchical vehicle subgroups
+	SLV_189,                                ///< 189   26450 Hierarchical vehicle subgroups
 
 	SLV_190,                                ///< 190   26547 Separate order travel and wait times
 	SLV_191,                                ///< 191   26636 FS#6026 Fix disaster vehicle storage (No bump)
@@ -283,7 +283,7 @@ enum SaveLoadVersion : uint16 {
 	SLV_EXTEND_CARGOTYPES,                  ///< 199  PR#6802 Extend cargotypes to 64
 
 	SLV_EXTEND_RAILTYPES,                   ///< 200  PR#6805 Extend railtypes to 64, adding uint16 to map array.
-	SLV_EXTEND_PERSISTENT_STORAGE,          ///< 201  PR#6885 Extend NewGRF persistant storages.
+	SLV_EXTEND_PERSISTENT_STORAGE,          ///< 201  PR#6885 Extend NewGRF persistent storages.
 	SLV_EXTEND_INDUSTRY_CARGO_SLOTS,        ///< 202  PR#6867 Increase industry cargo slots to 16 in, 16 out
 	SLV_SHIP_PATH_CACHE,                    ///< 203  PR#7072 Add path cache for ships
 	SLV_SHIP_ROTATION,                      ///< 204  PR#7065 Add extra rotation stages for ships.
diff --git a/src/saveload/strings_sl.cpp b/src/saveload/strings_sl.cpp
index 9e0351ae0..9c3f838a8 100644
--- a/src/saveload/strings_sl.cpp
+++ b/src/saveload/strings_sl.cpp
@@ -82,7 +82,7 @@ char *CopyFromOldName(StringID id)
 				case 0xB8: c = 0x017E; break; // z with caron
 				case 0xBC: c = 0x0152; break; // OE ligature
 				case 0xBD: c = 0x0153; break; // oe ligature
-				case 0xBE: c = 0x0178; break; // Y with diaresis
+				case 0xBE: c = 0x0178; break; // Y with diaeresis
 				default: break;
 			}
 
diff --git a/src/script/api/ai_changelog.hpp b/src/script/api/ai_changelog.hpp
index 7258cf74e..06ea54803 100644
--- a/src/script/api/ai_changelog.hpp
+++ b/src/script/api/ai_changelog.hpp
@@ -313,7 +313,7 @@
  *     destination it its catchment area. One industry tile or one town house
  *     is enough as long as station accepts the cargo. Awarded subsidies are no
  *     longer bound to stations used for first delivery, any station can be
- *     used for loading and unloading as long as cargo is transfered from
+ *     used for loading and unloading as long as cargo is transferred from
  *     source to destination.
  * \li Make AIEngine:CanRefitCargo() not report refittability to mail by
  *     default for aircraft. It is not necessarily true. This means that even
diff --git a/src/script/api/script_cargo.hpp b/src/script/api/script_cargo.hpp
index d1bfdd1fc..e977031a1 100644
--- a/src/script/api/script_cargo.hpp
+++ b/src/script/api/script_cargo.hpp
@@ -36,7 +36,7 @@ public:
 		CC_LIQUID       = ::CC_LIQUID,       ///< Liquids (Oil, Water, Rubber)
 		CC_REFRIGERATED = ::CC_REFRIGERATED, ///< Refrigerated cargo (Food, Fruit)
 		CC_HAZARDOUS    = ::CC_HAZARDOUS,    ///< Hazardous cargo (Nuclear Fuel, Explosives, etc.)
-		CC_COVERED      = ::CC_COVERED,      ///< Covered/Sheltered Freight (Transporation in Box Vans, Silo Wagons, etc.)
+		CC_COVERED      = ::CC_COVERED,      ///< Covered/Sheltered Freight (Transportation in Box Vans, Silo Wagons, etc.)
 	};
 
 	/**
diff --git a/src/script/api/script_event_types.hpp b/src/script/api/script_event_types.hpp
index f13e588ee..f9b2fb87f 100644
--- a/src/script/api/script_event_types.hpp
+++ b/src/script/api/script_event_types.hpp
@@ -799,8 +799,8 @@ private:
 
 /**
  * Event AircraftDestTooFar, indicating the next destination of an aircraft is too far away.
- * This event can be trigger when the current oder of an aircraft changes, usually either when
- * loading is done or when switch manually.
+ * This event can be triggered when the current order of an aircraft changes, usually either when
+ * loading is done or when switched manually.
  * @api ai
  */
 class ScriptEventAircraftDestTooFar : public ScriptEvent {
diff --git a/src/script/api/script_goal.cpp b/src/script/api/script_goal.cpp
index 461911d3c..4c0f5eb35 100644
--- a/src/script/api/script_goal.cpp
+++ b/src/script/api/script_goal.cpp
@@ -84,7 +84,7 @@
 	EnforcePrecondition(false, IsValidGoal(goal_id));
 	EnforcePrecondition(false, ScriptObject::GetCompany() == OWNER_DEITY);
 
-	/* Ensure null as used for emtpy string. */
+	/* Ensure null as used for empty string. */
 	if (progress != nullptr && StrEmpty(progress->GetEncodedText())) {
 		progress = nullptr;
 	}
diff --git a/src/script/api/script_road.hpp b/src/script/api/script_road.hpp
index 39cf0420b..bc230bda3 100644
--- a/src/script/api/script_road.hpp
+++ b/src/script/api/script_road.hpp
@@ -219,7 +219,7 @@ public:
 	static bool AreRoadTilesConnected(TileIndex tile_from, TileIndex tile_to);
 
 	/**
-	 * Lookup function for building road parts independend on whether the
+	 * Lookup function for building road parts independent of whether the
 	 *  "building on slopes" setting is enabled or not.
 	 *  This implementation can be used for abstract reasoning about a tile as
 	 *  it needs the slope and existing road parts of the tile as information.
@@ -250,10 +250,10 @@ public:
 	static int32 CanBuildConnectedRoadParts(ScriptTile::Slope slope, struct Array *existing, TileIndex start, TileIndex end);
 
 	/**
-	 * Lookup function for building road parts independend on whether the
+	 * Lookup function for building road parts independent of whether the
 	 *  "building on slopes" setting is enabled or not.
 	 *  This implementation can be used for reasoning about an existing tile.
-	 * @param tile The the tile to examine.
+	 * @param tile The tile to examine.
 	 * @param start The tile from where "tile" will be entered.
 	 * @param end The tile from where "tile" will be exited.
 	 * @pre start != end.
diff --git a/src/script/api/script_story_page.hpp b/src/script/api/script_story_page.hpp
index 772c16200..e806bb766 100644
--- a/src/script/api/script_story_page.hpp
+++ b/src/script/api/script_story_page.hpp
@@ -92,7 +92,7 @@ public:
 	 * Create a new story page element.
 	 * @param story_page_id The page id of the story page which the page element should be appended to.
 	 * @param type Which page element type to create.
-	 * @param reference A reference value to the object that is refered to by some page element types. When type is SPET_GOAL, this is the goal ID. When type is SPET_LOCATION, this is the TileIndex.
+	 * @param reference A reference value to the object that is referred to by some page element types. When type is SPET_GOAL, this is the goal ID. When type is SPET_LOCATION, this is the TileIndex.
 	 * @param text The body text of page elements that allow custom text. (SPET_TEXT and SPET_LOCATION)
 	 * @return The new StoryPageElementID, or STORY_PAGE_ELEMENT_INVALID if it failed.
 	 * @pre No ScriptCompanyMode may be in scope.
@@ -107,7 +107,7 @@ public:
 	/**
 	 * Update the content of a page element
 	 * @param story_page_element_id The page id of the story page which the page element should be appended to.
-	 * @param reference A reference value to the object that is refered to by some page element types. See also NewElement.
+	 * @param reference A reference value to the object that is referred to by some page element types. See also NewElement.
 	 * @param text The body text of page elements that allow custom text. See also NewElement.
 	 * @return True if the action succeeded.
 	 * @pre No ScriptCompanyMode may be in scope.
diff --git a/src/settings.cpp b/src/settings.cpp
index 88cd95b71..296b3abcf 100644
--- a/src/settings.cpp
+++ b/src/settings.cpp
@@ -1741,7 +1741,7 @@ void LoadFromConfig(bool minimal)
 
 		ValidateSettings();
 
-		/* Display sheduled errors */
+		/* Display scheduled errors */
 		extern void ScheduleErrorMessage(ErrorList &datas);
 		ScheduleErrorMessage(_settings_error_list);
 		if (FindWindowById(WC_ERRMSG, 0) == nullptr) ShowFirstError();
diff --git a/src/settings_type.h b/src/settings_type.h
index 9315cdd96..45d32105b 100644
--- a/src/settings_type.h
+++ b/src/settings_type.h
@@ -182,7 +182,7 @@ struct SoundSettings {
 	bool   news_ticker;                      ///< Play a ticker sound when a news item is published.
 	bool   news_full;                        ///< Play sound effects associated to certain news types.
 	bool   new_year;                         ///< Play sound on new year, summarising the performance during the last year.
-	bool   confirm;                          ///< Play sound effect on succesful constructions or other actions.
+	bool   confirm;                          ///< Play sound effect on successful constructions or other actions.
 	bool   click_beep;                       ///< Beep on a random selection of buttons.
 	bool   disaster;                         ///< Play disaster and accident sounds.
 	bool   vehicle;                          ///< Play vehicle sound effects.
diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp
index 7b6be3a41..4be95de76 100644
--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -704,7 +704,7 @@ static void ShipController(Ship *v)
 							if (st->facilities & FACIL_DOCK) { // ugly, ugly workaround for problem with ships able to drop off cargo at wrong stations
 								ShipArrivesAt(v, st);
 								v->BeginLoading();
-							} else { // leave stations without docks right aways
+							} else { // leave stations without docks right away
 								v->current_order.MakeLeaveStation();
 								v->IncrementRealOrderIndex();
 							}
@@ -774,7 +774,7 @@ static void ShipController(Ship *v)
 			return;
 		}
 
-		/* Ship is back on the bridge head, we need to comsume its path
+		/* Ship is back on the bridge head, we need to consume its path
 		 * cache entry here as we didn't have to choose a ship track. */
 		if (!v->path.empty()) v->path.pop_front();
 	}
diff --git a/src/sound/allegro_s.h b/src/sound/allegro_s.h
index 255be66c7..2ad371740 100644
--- a/src/sound/allegro_s.h
+++ b/src/sound/allegro_s.h
@@ -7,7 +7,7 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** @file allegro_s.h Base fo playing sound via Allegro. */
+/** @file allegro_s.h Base for playing sound via Allegro. */
 
 #ifndef SOUND_ALLEGRO_H
 #define SOUND_ALLEGRO_H
diff --git a/src/sound/sdl_s.h b/src/sound/sdl_s.h
index 2d36b4629..47352b517 100644
--- a/src/sound/sdl_s.h
+++ b/src/sound/sdl_s.h
@@ -7,7 +7,7 @@
  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** @file sdl_s.h Base fo playing sound via SDL. */
+/** @file sdl_s.h Base for playing sound via SDL. */
 
 #ifndef SOUND_SDL_H
 #define SOUND_SDL_H
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index b85c1e887..4519eba56 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -3101,7 +3101,7 @@ void StationPickerDrawSprite(int x, int y, StationType st, RailType railtype, Ro
 			/* Drive-through stop */
 			uint sprite_offset = 5 - image;
 
-			/* Road underlay takes precendence over tram */
+			/* Road underlay takes precedence over tram */
 			if (rti->UsesOverlay()) {
 				SpriteID ground = GetCustomRoadSprite(rti, INVALID_TILE, ROTSG_GROUND);
 				DrawSprite(ground + sprite_offset, PAL_NONE, x, y);
diff --git a/src/story.cpp b/src/story.cpp
index 4c7063cf0..d2a357b5f 100644
--- a/src/story.cpp
+++ b/src/story.cpp
@@ -45,7 +45,7 @@ INSTANTIATE_POOL_METHODS(StoryPage)
  * @param tile The tile parameter of the DoCommand proc
  * @param reference The reference parameter of the DoCommand proc (p2)
  * @param text The text parameter of the DoCommand proc
- * @return true, if and only if the given parameters are valid for the given page elment type and page id.
+ * @return true, if and only if the given parameters are valid for the given page element type and page id.
  */
 static bool VerifyElementContentParameters(StoryPageID page_id, StoryPageElementType type, TileIndex tile, uint32 reference, const char *text)
 {
diff --git a/src/story_gui.cpp b/src/story_gui.cpp
index 5ce77cc63..316e79ebb 100644
--- a/src/story_gui.cpp
+++ b/src/story_gui.cpp
@@ -263,7 +263,7 @@ protected:
 	/**
 	 * Counts how many pixels of height that are used by Date and Title
 	 * (excluding marginal after Title, as each body element has
-	 * an empty row before the elment).
+	 * an empty row before the element).
 	 * @param max_width Available width to display content.
 	 * @return the height in pixels.
 	 */
@@ -412,7 +412,7 @@ public:
 		this->vscroll = this->GetScrollbar(WID_SB_SCROLLBAR);
 		this->vscroll->SetStepSize(FONT_HEIGHT_NORMAL);
 
-		/* Initalize page sort. */
+		/* Initialize page sort. */
 		this->story_pages.SetSortFuncs(StoryBookWindow::page_sorter_funcs);
 		this->story_pages.ForceRebuild();
 		this->BuildStoryPageList();
diff --git a/src/table/elrail_data.h b/src/table/elrail_data.h
index 691536003..df5788fa8 100644
--- a/src/table/elrail_data.h
+++ b/src/table/elrail_data.h
@@ -412,7 +412,7 @@ static const SortableSpriteStruct RailCatenarySpriteData_Tunnel[] = {
  * Identifiers for Wires:
  * <ol><li>Direction of the wire</li>
  * <li>Slope of the tile for diagonals, placement inside the track for horiz/vertical pieces</li>
- * <li>Place where a pylon shoule be</li></ol>
+ * <li>Place where a pylon should be</li></ol>
  * Identifiers for Pylons:
  * <ol><li>Direction of the wire</li>
  * <li>Slope of the tile</li>
diff --git a/src/table/gameopt_settings.ini b/src/table/gameopt_settings.ini
index 9bacb80c7..b18ed9d75 100644
--- a/src/table/gameopt_settings.ini
+++ b/src/table/gameopt_settings.ini
@@ -12,7 +12,7 @@ static uint16 _old_diff_custom[GAME_DIFFICULTY_NUM];
 uint8 _old_diff_level;                                 ///< Old difficulty level from old savegames
 uint8 _old_units;                                      ///< Old units from old savegames
 
-/* Most of these strings are used both for gameopt-backward compatability
+/* Most of these strings are used both for gameopt-backward compatibility
  * and the settings tables. The rest is here for consistency. */
 static const char *_locale_currencies = "GBP|USD|EUR|YEN|ATS|BEF|CHF|CZK|DEM|DKK|ESP|FIM|FRF|GRD|HUF|ISK|ITL|NLG|NOK|PLN|RON|RUR|SIT|SEK|YTL|SKK|BRL|EEK|custom";
 static const char *_locale_units = "imperial|metric|si";
diff --git a/src/table/settings.h.preamble b/src/table/settings.h.preamble
index 08380cbf1..65fc489fa 100644
--- a/src/table/settings.h.preamble
+++ b/src/table/settings.h.preamble
@@ -33,7 +33,7 @@ static size_t ConvertLandscape(const char *value);
  *    Thse are for members in the struct described by the current
  *    #SettingDesc list / .ini file.  Here, 'base' specifies type of the
  *    struct while 'var' points out the member of the struct (the actual
- *    struct to store it in is implicitely defined by the #SettingDesc
+ *    struct to store it in is implicitly defined by the #SettingDesc
  *    list / .ini file preamble the entry is in).
  *
  * The something part defines the type of variable to store. There are a
diff --git a/src/table/settings.ini b/src/table/settings.ini
index 800d6f79c..714a8c86c 100644
--- a/src/table/settings.ini
+++ b/src/table/settings.ini
@@ -95,7 +95,7 @@ cat      = SC_ADVANCED
 
 
 ; Saved settings variables.
-; Do not ADD or REMOVE something in this "difficulty.XXX" table or before it. It breaks savegame compatability.
+; Do not ADD or REMOVE something in this "difficulty.XXX" table or before it. It breaks savegame compatibility.
 [SDT_VAR]
 base     = GameSettings
 var      = difficulty.max_no_competitors
@@ -3947,7 +3947,7 @@ cat      = SC_EXPERT
 ; Since the network code (CmdChangeSetting and friends) use the index in this array to decide
 ; which setting the server is talking about all conditional compilation of this array must be at the
 ; end. This isn't really the best solution, the settings the server can tell the client about should
-; either use a seperate array or some other form of identifier.
+; either use a separate array or some other form of identifier.
 
 ;
 ; We might need to emulate a right mouse button on mac
diff --git a/src/table/sprites.h b/src/table/sprites.h
index 5f5aa4705..a0e068f8f 100644
--- a/src/table/sprites.h
+++ b/src/table/sprites.h
@@ -27,10 +27,10 @@
  * All sprites which are described here are referenced only one to a handful of times
  * throughout the code. When introducing new sprite enums, use meaningful names.
  * Don't be lazy and typing, and only use abbreviations when their meaning is clear or
- * the length of the enum would get out of hand. In that case EXPLAIN THE ABBREVATION
+ * the length of the enum would get out of hand. In that case EXPLAIN THE ABBREVIATION
  * IN THIS FILE, and perhaps add some comments in the code where it is used.
  * Now, don't whine about this being too much typing work if the enums are like
- * 30 characters in length. If your editor doen't help you simplifying your work,
+ * 30 characters in length. If your editor doesn't help you simplifying your work,
  * get a proper editor. If your Operating Systems don't have any decent editors,
  * get a proper Operating System.
  *
diff --git a/src/tile_map.cpp b/src/tile_map.cpp
index 5d85ef966..a30d1e442 100644
--- a/src/tile_map.cpp
+++ b/src/tile_map.cpp
@@ -76,8 +76,8 @@ Slope GetTileSlope(TileIndex tile, int *h)
 /**
  * Return the slope of a given tile, also for tiles outside the map (virtual "black" tiles).
  *
- * @param x X coordinate of the tile to compute slope of, may be ouside the map.
- * @param y Y coordinate of the tile to compute slope of, may be ouside the map.
+ * @param x X coordinate of the tile to compute slope of, may be outside the map.
+ * @param y Y coordinate of the tile to compute slope of, may be outside the map.
  * @param h If not \c nullptr, pointer to storage of z height.
  * @return Slope of the tile, except for the HALFTILE part.
  */
diff --git a/src/tile_map.h b/src/tile_map.h
index 0cb28122d..89467c4d0 100644
--- a/src/tile_map.h
+++ b/src/tile_map.h
@@ -37,8 +37,8 @@ static inline uint TileHeight(TileIndex tile)
 /**
  * Returns the height of a tile, also for tiles outside the map (virtual "black" tiles).
  *
- * @param x X coordinate of the tile, may be ouside the map.
- * @param y Y coordinate of the tile, may be ouside the map.
+ * @param x X coordinate of the tile, may be outside the map.
+ * @param y Y coordinate of the tile, may be outside the map.
  * @return The height in the same unit as TileHeight.
  */
 static inline uint TileHeightOutsideMap(int x, int y)
@@ -79,8 +79,8 @@ static inline uint TilePixelHeight(TileIndex tile)
 /**
  * Returns the height of a tile in pixels, also for tiles outside the map (virtual "black" tiles).
  *
- * @param x X coordinate of the tile, may be ouside the map.
- * @param y Y coordinate of the tile, may be ouside the map.
+ * @param x X coordinate of the tile, may be outside the map.
+ * @param y Y coordinate of the tile, may be outside the map.
  * @return The height in pixels in the same unit as TilePixelHeight.
  */
 static inline uint TilePixelHeightOutsideMap(int x, int y)
diff --git a/src/town.h b/src/town.h
index b0f4a5c72..ecf8a4f76 100644
--- a/src/town.h
+++ b/src/town.h
@@ -36,7 +36,7 @@ static const TownID INVALID_TOWN = 0xFFFF;
 static const uint TOWN_GROWTH_WINTER = 0xFFFFFFFE; ///< The town only needs this cargo in the winter (any amount)
 static const uint TOWN_GROWTH_DESERT = 0xFFFFFFFF; ///< The town needs the cargo for growth when on desert (any amount)
 static const uint16 TOWN_GROWTH_RATE_NONE = 0xFFFF; ///< Special value for Town::growth_rate to disable town growth.
-static const uint16 MAX_TOWN_GROWTH_TICKS = 930; ///< Max amount of original town ticks that still fit into uint16, about equal to UINT16_MAX / TOWN_GROWTH_TICKS but sligtly less to simplify calculations
+static const uint16 MAX_TOWN_GROWTH_TICKS = 930; ///< Max amount of original town ticks that still fit into uint16, about equal to UINT16_MAX / TOWN_GROWTH_TICKS but slightly less to simplify calculations
 
 typedef Pool<Town, TownID, 64, 64000> TownPool;
 extern TownPool _town_pool;
diff --git a/src/townname.cpp b/src/townname.cpp
index d382adf34..6d3035886 100644
--- a/src/townname.cpp
+++ b/src/townname.cpp
@@ -124,7 +124,7 @@ bool GenerateTownName(uint32 *townnameparts, TownNames *town_names)
 	TownNameParams par(_settings_game.game_creation.town_name);
 
 	/* This function is called very often without entering the gameloop
-	 * inbetween. So reset layout cache to prevent it from growing too big. */
+	 * in between. So reset layout cache to prevent it from growing too big. */
 	Layouter::ReduceLineCache();
 
 	/* Do not set i too low, since when we run out of names, we loop
diff --git a/src/track_func.h b/src/track_func.h
index a55d6d8f2..4171a808b 100644
--- a/src/track_func.h
+++ b/src/track_func.h
@@ -19,7 +19,7 @@
 
 /**
  * Iterate through each set Track in a TrackBits value.
- * For more informations see FOR_EACH_SET_BIT_EX.
+ * For more information see FOR_EACH_SET_BIT_EX.
  *
  * @param var Loop index variable that stores fallowing set track. Must be of type Track.
  * @param track_bits The value to iterate through (any expression).
@@ -127,7 +127,7 @@ static inline TrackdirBits TrackdirToTrackdirBits(Trackdir trackdir)
 /**
  * Removes first Track from TrackBits and returns it
  *
- * This function searchs for the first bit in the TrackBits,
+ * This function searches for the first bit in the TrackBits,
  * remove this bit from the parameter and returns the found
  * bit as Track value. It returns INVALID_TRACK if the
  * parameter was TRACK_BIT_NONE or INVALID_TRACK_BIT. This
@@ -647,7 +647,7 @@ static inline bool IsDiagonalTrackdir(Trackdir trackdir)
 
 /**
  * Checks if the given tracks overlap, ie form a crossing. Basically this
- * means when there is more than one track on the tile, exept when there are
+ * means when there is more than one track on the tile, except when there are
  * two parallel tracks.
  * @param  bits The tracks present.
  * @return Whether the tracks present overlap in any way.
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index 71b34d6ba..4a4334418 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -1280,7 +1280,7 @@ CommandCost CmdMoveRailVehicle(TileIndex tile, DoCommandFlag flags, uint32 p1, u
 		 *     b) the 'next' part is an engine that becomes a front engine.
 		 *     c) there is no 'next' part, nothing else happens
 		 *  5) non front engine gets moved and becomes a new train, nothing else happens
-		 *  6) non front engine gets moved within a train / to another train, nothing hapens
+		 *  6) non front engine gets moved within a train / to another train, nothing happens
 		 *  7) wagon gets moved, nothing happens
 		 */
 		if (src == original_src_head && src->IsEngine() && !src->IsFrontEngine()) {
diff --git a/src/tree_map.h b/src/tree_map.h
index bd1567b54..f6315e971 100644
--- a/src/tree_map.h
+++ b/src/tree_map.h
@@ -100,8 +100,8 @@ static inline TreeGround GetTreeGround(TileIndex t)
  * that this value doesn't count the number of trees on a tile, use
  * #GetTreeCount instead. This function instead returns some kind of
  * groundtype of the tile. As the map-array is finite in size and
- * the informations about the trees must be saved somehow other
- * informations about a tile must be saved somewhere encoded in the
+ * the information about the trees must be saved somehow other
+ * information about a tile must be saved somewhere encoded in the
  * tile. So this function returns the density of a tile for sub arctic
  * and sub tropical games. This means for sub arctic the type of snowline
  * (0 to 3 for all 4 types of snowtiles) and for sub tropical the value
@@ -264,7 +264,7 @@ static inline void SetTreeCounter(TileIndex t, uint c)
 /**
  * Make a tree-tile.
  *
- * This functions change the tile to a tile with trees and all informations which belongs to it.
+ * This functions change the tile to a tile with trees and all information which belongs to it.
  *
  * @param t The tile to make a tree-tile from
  * @param type The type of the tree
diff --git a/src/tunnelbridge_cmd.cpp b/src/tunnelbridge_cmd.cpp
index fce0855d2..db3368050 100644
--- a/src/tunnelbridge_cmd.cpp
+++ b/src/tunnelbridge_cmd.cpp
@@ -1132,7 +1132,7 @@ static void DrawBridgeRoadBits(TileIndex head_tile, int x, int y, int z, int off
 	static const SpriteID front_offsets[6]   = {  97,  98, 103, 106, 104, 105 };
 
 	if (head || !IsInvisibilitySet(TO_BRIDGES)) {
-		/* Road underlay takes precendence over tram */
+		/* Road underlay takes precedence over tram */
 		trans_back[0] = !head && IsTransparencySet(TO_BRIDGES);
 		if (road_rti != nullptr) {
 			if (road_rti->UsesOverlay()) {
@@ -1166,7 +1166,7 @@ static void DrawBridgeRoadBits(TileIndex head_tile, int x, int y, int z, int off
 			}
 		}
 
-		/* Road catenary takes precendence over tram */
+		/* Road catenary takes precedence over tram */
 		trans_back[3] = IsTransparencySet(TO_CATENARY);
 		trans_front[0] = IsTransparencySet(TO_CATENARY);
 		if (road_rti != nullptr && HasRoadCatenaryDrawn(road_rt)) {
@@ -1289,7 +1289,7 @@ static void DrawTile_TunnelBridge(TileInfo *ti)
 
 			DrawRoadOverlays(ti, PAL_NONE, road_rti, tram_rti, sprite_offset, sprite_offset);
 
-			/* Road catenary takes precendence over tram */
+			/* Road catenary takes precedence over tram */
 			SpriteID catenary_sprite_base = 0;
 			if (road_rti != nullptr && HasRoadCatenaryDrawn(road_rt)) {
 				catenary_sprite_base = GetCustomRoadSprite(road_rti, ti->tile, ROTSG_CATENARY_FRONT);
diff --git a/src/vehicle.cpp b/src/vehicle.cpp
index 6e26c7bfe..0bb4ed178 100644
--- a/src/vehicle.cpp
+++ b/src/vehicle.cpp
@@ -2332,7 +2332,7 @@ CommandCost Vehicle::SendToDepot(DoCommandFlag flags, DepotCommand command)
 			return CommandCost();
 		}
 
-		if (command & DEPOT_DONT_CANCEL) return CMD_ERROR; // Requested no cancelation of depot orders
+		if (command & DEPOT_DONT_CANCEL) return CMD_ERROR; // Requested no cancellation of depot orders
 		if (flags & DC_EXEC) {
 			/* If the orders to 'goto depot' are in the orders list (forced servicing),
 			 * then skip to the next order; effectively cancelling this forced service */
diff --git a/src/vehicle_type.h b/src/vehicle_type.h
index 74bd5660d..29929fd8b 100644
--- a/src/vehicle_type.h
+++ b/src/vehicle_type.h
@@ -65,7 +65,7 @@ enum VehiclePathFinders {
 
 /** Flags to add to p1 for goto depot commands. */
 enum DepotCommand {
-	DEPOT_SERVICE       = (1U << 28), ///< The vehicle will leave the depot right after arrival (serivce only)
+	DEPOT_SERVICE       = (1U << 28), ///< The vehicle will leave the depot right after arrival (service only)
 	DEPOT_MASS_SEND     = (1U << 29), ///< Tells that it's a mass send to depot command (type in VLW flag)
 	DEPOT_DONT_CANCEL   = (1U << 30), ///< Don't cancel current goto depot command if any
 	DEPOT_LOCATE_HANGAR = (1U << 31), ///< Find another airport if the target one lacks a hangar
diff --git a/src/video/cocoa/cocoa_keys.h b/src/video/cocoa/cocoa_keys.h
index 426befd18..e2d5ee9fc 100644
--- a/src/video/cocoa/cocoa_keys.h
+++ b/src/video/cocoa/cocoa_keys.h
@@ -126,7 +126,7 @@
 #define QZ_KP0          0x52
 #define QZ_KP_PERIOD    0x41
 
-/* Wierd, these keys are on my iBook under MacOS X */
+/* Weird, these keys are on my iBook under MacOS X */
 #define QZ_IBOOK_ENTER  0x34
 #define QZ_IBOOK_LEFT   0x3B
 #define QZ_IBOOK_RIGHT  0x3C
diff --git a/src/viewport_type.h b/src/viewport_type.h
index f5544679a..1f61b2d70 100644
--- a/src/viewport_type.h
+++ b/src/viewport_type.h
@@ -22,7 +22,7 @@ class LinkGraphOverlay;
  * Data structure for viewport, display of a part of the world
  */
 struct ViewPort {
-	int left;    ///< Screen coordinate left egde of the viewport
+	int left;    ///< Screen coordinate left edge of the viewport
 	int top;     ///< Screen coordinate top edge of the viewport
 	int width;   ///< Screen width of the viewport
 	int height;  ///< Screen height of the viewport
diff --git a/src/void_cmd.cpp b/src/void_cmd.cpp
index 9a0134f59..56e7cc526 100644
--- a/src/void_cmd.cpp
+++ b/src/void_cmd.cpp
@@ -28,7 +28,7 @@ static void DrawTile_Void(TileInfo *ti)
 
 static int GetSlopePixelZ_Void(TileIndex tile, uint x, uint y)
 {
-	/* This function may be called on tiles outside the map, don't asssume
+	/* This function may be called on tiles outside the map, don't assume
 	 * that 'tile' is a valid tile index. See GetSlopePixelZOutsideMap. */
 	int z;
 	Slope tileh = GetTilePixelSlopeOutsideMap(x >> 4, y >> 4, &z);
diff --git a/src/water_map.h b/src/water_map.h
index 375c80e6c..05f49afb1 100644
--- a/src/water_map.h
+++ b/src/water_map.h
@@ -28,8 +28,8 @@ enum WaterTileTypeBitLayout {
 
 	WBL_COAST_FLAG        = 0,   ///< Flag for coast.
 
-	WBL_LOCK_ORIENT_BEGIN = 0,   ///< Start of lock orientiation bitfield.
-	WBL_LOCK_ORIENT_COUNT = 2,   ///< Length of lock orientiation bitfield.
+	WBL_LOCK_ORIENT_BEGIN = 0,   ///< Start of lock orientation bitfield.
+	WBL_LOCK_ORIENT_COUNT = 2,   ///< Length of lock orientation bitfield.
 	WBL_LOCK_PART_BEGIN   = 2,   ///< Start of lock part bitfield.
 	WBL_LOCK_PART_COUNT   = 2,   ///< Length of lock part bitfield.
 
diff --git a/src/widget_type.h b/src/widget_type.h
index 6372ed799..261e3cdf3 100644
--- a/src/widget_type.h
+++ b/src/widget_type.h
@@ -247,7 +247,7 @@ public:
 	uint min_y; ///< Minimal vertical size of only this widget.
 };
 
-/** Nested widget flags that affect display and interaction withe 'real' widgets. */
+/** Nested widget flags that affect display and interaction with 'real' widgets. */
 enum NWidgetDisplay {
 	/* Generic. */
 	NDB_LOWERED         = 0, ///< Widget is lowered (pressed down) bit.
diff --git a/src/window.cpp b/src/window.cpp
index 9786459db..25e4eb95a 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -119,7 +119,7 @@ WindowDesc::~WindowDesc()
 
 /**
  * Determine default width of window.
- * This is either a stored user preferred size, or the build-in default.
+ * This is either a stored user preferred size, or the built-in default.
  * @return Width in pixels.
  */
 int16 WindowDesc::GetDefaultWidth() const
@@ -129,7 +129,7 @@ int16 WindowDesc::GetDefaultWidth() const
 
 /**
  * Determine default height of window.
- * This is either a stored user preferred size, or the build-in default.
+ * This is either a stored user preferred size, or the built-in default.
  * @return Height in pixels.
  */
 int16 WindowDesc::GetDefaultHeight() const