Cleanup: Fix various spelling errors

src/blitter/40bpp_anim.cpp

@@ -113,7 +113,7 @@ inline void Blitter_40bppAnim::Draw(const Blitter::BlitterParams *bp, ZoomLevel
 	assert(VideoDriver::GetInstance()->GetAnimBuffer() != nullptr);
 	uint8_t *anim = VideoDriver::GetInstance()->GetAnimBuffer() + ((uint32_t *)bp->dst - (uint32_t *)_screen.dst_ptr) + 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 uint8_t *remap = bp->remap;
 
 	for (int y = 0; y < bp->height; y++) {

src/cargopacket.h

@@ -184,7 +184,7 @@ public:
 	/**
 	 * Gets the number of cargo aging periods this cargo has been in transit.
 	 * By default a period is 2.5 days (CARGO_AGING_TICKS = 185 ticks), however
-	 * vehicle NewGRFs can overide the length of the cargo aging period. The
+	 * vehicle NewGRFs can override the length of the cargo aging period. The
 	 * value is capped at UINT16_MAX.
 	 * @return Length this cargo has been in transit.
 	 */

src/cargotype.cpp

@@ -44,7 +44,7 @@ CargoTypes _standard_cargo_mask;
 static std::vector<CargoLabel> _default_cargo_labels;
 
 /**
- * Default cargo translation for upto version 7 NewGRFs.
+ * Default cargo translation for up to version 7 NewGRFs.
  * This maps the original 12 cargo slots to their original label. If a climate dependent cargo is not present it will
  * map to CT_INVALID. For default cargoes this ends up as a 1:1 mapping via climate slot -> label -> cargo type.
  */
@@ -137,7 +137,7 @@ void BuildCargoLabelMap()
 	for (const CargoSpec &cs : CargoSpec::array) {
 		/* During initialization, CargoSpec can be marked valid before the label has been set. */
 		if (!cs.IsValid() || cs.label == CargoLabel{} || cs.label == CT_INVALID) continue;
-		/* Label already exists, don't addd again. */
+		/* Label already exists, don't add again. */
 		if (CargoSpec::label_map.count(cs.label) != 0) continue;
 
 		CargoSpec::label_map.emplace(cs.label, cs.Index());

src/cargotype.h

@@ -85,7 +85,7 @@ struct CargoSpec {
 	bool is_freight;                 ///< Cargo type is considered to be freight (affects train freight multiplier).
 	TownAcceptanceEffect town_acceptance_effect; ///< The effect that delivering this cargo type has on towns. Also affects destination of subsidies.
 	TownProductionEffect town_production_effect = INVALID_TPE; ///< The effect on town cargo production.
-	uint16_t town_production_multiplier = TOWN_PRODUCTION_DIVISOR; ///< Town production multipler, if commanded by TownProductionEffect.
+	uint16_t town_production_multiplier = TOWN_PRODUCTION_DIVISOR; ///< Town production multiplier, if commanded by TownProductionEffect.
 	CargoCallbackMasks callback_mask;             ///< Bitmask of cargo callbacks that have to be called
 
 	StringID name;                   ///< Name of this type of cargo.

src/company_gui.cpp

@@ -2334,7 +2334,7 @@ struct CompanyWindow : Window
 		}
 
 		if (y == r.top) {
-			/* No String was emited before, so there must be no vehicles at all. */
+			/* No String was emitted before, so there must be no vehicles at all. */
 			DrawString(r.left, r.right, y, STR_COMPANY_VIEW_VEHICLES_NONE);
 		}
 	}
@@ -2377,7 +2377,7 @@ struct CompanyWindow : Window
 		}
 
 		if (y == r.top) {
-			/* No String was emited before, so there must be no infrastructure at all. */
+			/* No String was emitted before, so there must be no infrastructure at all. */
 			DrawString(r.left, r.right, y, STR_COMPANY_VIEW_INFRASTRUCTURE_NONE);
 		}
 	}

src/debug.h

@@ -29,7 +29,7 @@
  */
 
 /**
- * Ouptut a line of debugging information.
+ * Output a line of debugging information.
  * @param category The category of debug information.
  * @param level The maximum debug level this message should be shown at. When the debug level for this category is set lower, then the message will not be shown.
  * @param format_string The formatting string of the message.

src/economy.cpp

@@ -690,7 +690,7 @@ static void CompaniesGenStatistics()
 	}
 	cur_company.Restore();
 
-	/* Only run the economic statics and update company stats every 3rd economy month (1st of quarter). */
+	/* Only run the economic statistics and update company stats every 3rd economy month (1st of quarter). */
 	if (!HasBit(1 << 0 | 1 << 3 | 1 << 6 | 1 << 9, TimerGameEconomy::month)) return;
 
 	for (Company *c : Company::Iterate()) {

src/fileio.cpp

@@ -426,7 +426,7 @@ bool TarScanner::AddFile(Subdirectory sd, const std::string &filename)
  * header contains garbage and is malicious. So, we cannot rely on the string
  * being properly terminated.
  * As such, do not use strlen to determine the actual length (explicitly or
- * implictly via the std::string constructor), but pass the buffer bounds
+ * implicitly via the std::string constructor), but pass the buffer bounds
  * explicitly.
  * @param buffer The buffer to read from.
  * @return The string data.

src/gamelog.cpp

@@ -176,7 +176,7 @@ void Gamelog::Print(std::function<void(const std::string &)> proc)
 
 /* virtual */ void LoggedChangeRevision::FormatTo(std::back_insert_iterator<std::string> &output_iterator, GrfIDMapping &, GamelogActionType)
 {
-	/* The game was loaded in a diffferent version than before. */
+	/* The game was loaded in a different version than before. */
 	fmt::format_to(output_iterator, "Revision text changed to {}, savegame version {}, ",
 		this->text, this->slver);
 

src/gamelog_internal.h

@@ -17,7 +17,7 @@
  * Information about the presence of a Grf at a certain point during gamelog history
  * Note about missing Grfs:
  * Changes to missing Grfs are not logged including manual removal of the Grf.
- * So if the gamelog tells a Grf is missing we do not know whether it was readded or completely removed
+ * So if the gamelog tells a Grf is missing we do not know whether it was re-added or completely removed
  * at some later point.
  */
 struct GRFPresence {

src/genworld.h

@@ -52,7 +52,7 @@ static const uint CUSTOM_SEA_LEVEL_MAX_PERCENTAGE = 90;   ///< Maximum percentag
 static constexpr uint MAP_HEIGHT_LIMIT_ORIGINAL = 15; ///< Original map height limit.
 
 static const uint MAP_HEIGHT_LIMIT_AUTO_MINIMUM = 30; ///< When map height limit is auto, make this the lowest possible map height limit.
-static const uint MAP_HEIGHT_LIMIT_AUTO_CEILING_ROOM = 15; ///< When map height limit is auto, the map height limit will be the higest peak plus this value.
+static const uint MAP_HEIGHT_LIMIT_AUTO_CEILING_ROOM = 15; ///< When map height limit is auto, the map height limit will be the highest peak plus this value.
 
 typedef void GWDoneProc();  ///< Procedure called when the genworld process finishes
 typedef void GWAbortProc(); ///< Called when genworld is aborted

src/gfx.cpp

@@ -1786,7 +1786,7 @@ void UpdateGUIZoom()
 
 /**
  * Resolve GUI zoom level and adjust GUI to new zoom, if auto-suggestion is requested.
- * @param automatic Set if the change is occuring due to OS DPI scaling being changed.
+ * @param automatic Set if the change is occurring due to OS DPI scaling being changed.
  * @returns true when the zoom level has changed, caller must call ReInitAllWindows(true)
  * after resizing the application's window/buffer.
  */

src/ground_vehicle.cpp

@@ -149,7 +149,7 @@ int GroundVehicle<T, Type>::GetAcceleration() const
 	AccelStatus mode = v->GetAccelerationStatus();
 
 	const int max_te = this->gcache.cached_max_te; // [N]
-	/* Constructued from power, with need to multiply by 18 and assuming
+	/* Constructed from power, with need to multiply by 18 and assuming
 	 * low speed, it needs to be a 64 bit integer too. */
 	int64_t force;
 	if (speed > 0) {

src/industry_cmd.cpp

@@ -1788,7 +1788,7 @@ static void DoCreateNewIndustry(Industry *i, TileIndex tile, IndustryType type,
 		a.cargo = indspec->accepts_cargo[index];
 	}
 
-	/* Randomize inital production if non-original economy is used and there are no production related callbacks. */
+	/* Randomize initial production if non-original economy is used and there are no production related callbacks. */
 	if (!indspec->UsesOriginalEconomy()) {
 		for (auto &p : i->produced) {
 			p.rate = ClampTo<uint8_t>((RandomRange(256) + 128) * p.rate >> 8);

src/industry_map.h

@@ -180,7 +180,7 @@ inline void SetIndustryConstructionCounter(Tile tile, uint8_t value)
 /**
  * Reset the construction stage counter of the industry,
  * as well as the completion bit.
- * In fact, it is the same as restarting construction frmo ground up
+ * In fact, it is the same as restarting construction from the ground up.
  * @param tile the tile to query
  * @pre IsTileType(tile, MP_INDUSTRY)
  */

src/landscape.cpp

@@ -260,7 +260,7 @@ uint GetPartialPixelZ(int x, int y, Slope corners)
 		case SLOPE_S: return x + y >= (int)TILE_SIZE ? (1 + x + y - TILE_SIZE) >> 1 : 0;
 		case SLOPE_W: return x >= y                  ? (x - y)                 >> 1 : 0;
 
-		/* Two corners next to eachother are up. */
+		/* Two corners next to each other are up. */
 		case SLOPE_NE: return (TILE_SIZE - x) >> 1;
 		case SLOPE_SE: return (y + 1) >> 1;
 		case SLOPE_SW: return (x + 1) >> 1;
@@ -1433,7 +1433,7 @@ static void CreateRivers()
  * Calculate what height would be needed to cover N% of the landmass.
  *
  * The function allows both snow and desert/tropic line to be calculated. It
- * tries to find the closests height which covers N% of the landmass; it can
+ * tries to find the closest height which covers N% of the landmass; it can
  * be below or above it.
  *
  * Tropic has a mechanism where water and tropic tiles in mountains grow

src/league_gui.cpp

@@ -264,7 +264,7 @@ private:
 	uint score_width;    ///< The width of the score text
 	uint header_height;  ///< Height of the table header
 	int line_height;     ///< Height of the text lines
-	Dimension icon_size; ///< Dimenion of the company icon.
+	Dimension icon_size; ///< Dimension of the company icon.
 	std::string title;
 
 	/**

src/map.cpp

@@ -152,7 +152,7 @@ uint DistanceManhattan(TileIndex t0, TileIndex t1)
  * Gets the 'Square' distance between the two given tiles.
  * The 'Square' distance is the square of the shortest (straight line)
  * distance between the two tiles.
- * Also known as euclidian- or L2-Norm squared.
+ * Also known as Euclidean- or L2-Norm squared.
  * @param t0 the start tile
  * @param t1 the end tile
  * @return the distance

src/map_func.h

@@ -539,7 +539,7 @@ inline TileIndexDiffC TileIndexToTileIndexDiffC(TileIndex tile_a, TileIndex tile
 
 /* Functions to calculate distances */
 uint DistanceManhattan(TileIndex, TileIndex); ///< also known as L1-Norm. Is the shortest distance one could go over diagonal tracks (or roads)
-uint DistanceSquare(TileIndex, TileIndex); ///< euclidian- or L2-Norm squared
+uint DistanceSquare(TileIndex, TileIndex); ///< Euclidean- or L2-Norm squared
 uint DistanceMax(TileIndex, TileIndex); ///< also known as L-Infinity-Norm
 uint DistanceMaxPlusManhattan(TileIndex, TileIndex); ///< Max + Manhattan
 uint DistanceFromEdge(TileIndex); ///< shortest distance from any edge of the map

src/network/core/http_winhttp.cpp

@@ -188,7 +188,7 @@ void NetworkHTTPRequest::WinHttpCallback(DWORD code, void *info, DWORD length)
 			break;
 
 		default:
-			Debug(net, 0, "HTTP request failed: unexepected callback code 0x{:x}", code);
+			Debug(net, 0, "HTTP request failed: unexpected callback code 0x{:x}", code);
 			this->callback.OnFailure();
 			this->finished = true;
 			return;

src/network/core/network_game_info.cpp

@@ -300,7 +300,7 @@ void DeserializeNetworkGameInfo(Packet &p, NetworkGameInfo &info, const GameInfo
 
 		case 4: {
 			/* Ensure that the maximum number of NewGRFs and the field in the network
-			 * protocol are matched to eachother. If that is not the case anymore a
+			 * protocol are matched to each other. If that is not the case anymore a
 			 * check must be added to ensure the received data is still valid. */
 			static_assert(std::numeric_limits<uint8_t>::max() == NETWORK_MAX_GRF_COUNT);
 			uint num_grfs = p.Recv_uint8();

src/network/core/packet.cpp

@@ -442,7 +442,7 @@ std::string Packet::Recv_string(size_t length, StringValidationSettings settings
 
 /**
  * Get the amount of bytes that are still available for the Transfer functions.
- * @return The number of bytes that still have to be transfered.
+ * @return The number of bytes that still have to be transferred.
  */
 size_t Packet::RemainingBytesToTransfer() const
 {

src/network/core/tcp_admin.h

@@ -174,7 +174,7 @@ protected:
 	 * Send chat from the external source:
 	 * string  Name of the source this message came from.
 	 * uint16_t  TextColour to use for the message.
-	 * string  Name of the user who sent the messsage.
+	 * string  Name of the user who sent the message.
 	 * string  Message.
 	 * @param p The packet that was just received.
 	 * @return The state the network should have.

src/network/core/tcp_content.cpp

@@ -142,7 +142,7 @@ bool NetworkContentSocketHandler::ReceivePackets()
 	 * As a result, we simple handle an arbitrary number of packets in one cycle,
 	 * and let the rest be handled in subsequent cycles. These are ran, almost,
 	 * immediately after this cycle so in speed it does not matter much, except
-	 * that the user inferface will appear better responding.
+	 * that the user interface will appear better responding.
 	 *
 	 * What arbitrary number to choose is the ultimate question though.
 	 */

src/network/core/tcp_coordinator.h

@@ -227,7 +227,7 @@ protected:
 	/**
 	 * Game Coordinator requests the client/server to do a STUN request to the
 	 * STUN server. Important is to remember the local port these STUN requests
-	 * are sent from, as this will be needed for later conenctions too.
+	 * are sent from, as this will be needed for later connections too.
 	 * The client/server should do multiple STUN requests for every available
 	 * interface that connects to the Internet (e.g., once for IPv4 and once
 	 * for IPv6).

src/network/core/tcp_game.h

@@ -372,7 +372,7 @@ protected:
 	 * Sends a chat-packet for external source to the client:
 	 * string  Name of the source this message came from.
 	 * uint16_t  TextColour to use for the message.
-	 * string  Name of the user who sent the messsage.
+	 * string  Name of the user who sent the message.
 	 * string  Message (max NETWORK_CHAT_LENGTH).
 	 * @param p The packet that was just received.
 	 */

src/network/network.cpp

@@ -804,7 +804,7 @@ bool NetworkClientConnectGame(const std::string &connection_string, CompanyID de
 	} else {
 		/* When already playing a game, first go back to the main menu. This
 		 * disconnects the user from the current game, meaning we can safely
-		 * load in the new. After all, there is little point in continueing to
+		 * load in the new. After all, there is little point in continuing to
 		 * play on a server if we are connecting to another one.
 		 */
 		_switch_mode = SM_JOIN_GAME;

src/network/network_content_gui.cpp

@@ -321,7 +321,7 @@ struct ContentListFilterData {
 
 /** Filter criteria for NetworkContentListWindow. */
 enum ContentListFilterCriteria : uint8_t {
-	CONTENT_FILTER_TEXT = 0,        ///< Filter by query sting
+	CONTENT_FILTER_TEXT = 0,        ///< Filter by query string
 	CONTENT_FILTER_TYPE_OR_SELECTED,///< Filter by being of displayed type or selected for download
 };
 

src/network/network_coordinator.cpp

@@ -250,7 +250,7 @@ bool ClientNetworkCoordinatorSocketHandler::Receive_GC_LISTING(Packet &p)
 		ClearGRFConfigList(item->info.grfconfig);
 		/* Read the NetworkGameInfo from the packet. */
 		DeserializeNetworkGameInfo(p, item->info, &this->newgrf_lookup_table);
-		/* Check for compatability with the client. */
+		/* Check for compatibility with the client. */
 		CheckGameCompatibility(item->info);
 		/* Mark server as online. */
 		item->status = NGLS_ONLINE;

src/network/network_query.cpp

@@ -123,7 +123,7 @@ NetworkRecvStatus QueryNetworkGameSocketHandler::Receive_SERVER_GAME_INFO(Packet
 	ClearGRFConfigList(item->info.grfconfig);
 	/* Retrieve the NetworkGameInfo from the packet. */
 	DeserializeNetworkGameInfo(p, item->info);
-	/* Check for compatability with the client. */
+	/* Check for compatibility with the client. */
 	CheckGameCompatibility(item->info);
 	/* Ensure we consider the server online. */
 	item->status = NGLS_ONLINE;

src/network/network_query.h

@@ -12,7 +12,7 @@
 
 #include "network_internal.h"
 
-/** Class for handling the client side of quering a game server. */
+/** Class for handling the client side of querying a game server. */
 class QueryNetworkGameSocketHandler : public NetworkGameSocketHandler {
 private:
 	static std::vector<std::unique_ptr<QueryNetworkGameSocketHandler>> queries; ///< Pending queries.
@@ -32,7 +32,7 @@ protected:
 
 public:
 	/**
-	 * Create a new socket for the client side of quering game server.
+	 * Create a new socket for the client side of querying game server.
 	 * @param s The socket to connect with.
 	 * @param connection_string The connection string of the server.
 	 */

src/network/network_server.cpp

@@ -256,7 +256,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::CloseConnection(NetworkRecvSta
 		}
 	}
 
-	/* If we were transfering a map to this client, stop the savegame creation
+	/* If we were transferring a map to this client, stop the savegame creation
 	 * process and queue the next client to receive the map. */
 	if (this->status == STATUS_MAP) {
 		/* Ensure the saving of the game is stopped too. */
@@ -697,7 +697,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::SendChat(NetworkAction action,
  * Send a chat message from external source.
  * @param source Name of the source this message came from.
  * @param colour TextColour to use for the message.
- * @param user Name of the user who sent the messsage.
+ * @param user Name of the user who sent the message.
  * @param msg The actual message.
  */
 NetworkRecvStatus ServerNetworkGameSocketHandler::SendExternalChat(const std::string &source, TextColour colour, const std::string &user, const std::string &msg)
@@ -1363,7 +1363,7 @@ void NetworkServerSendChat(NetworkAction action, DestType desttype, int dest, co
  * Send a chat message from external source.
  * @param source Name of the source this message came from.
  * @param colour TextColour to use for the message.
- * @param user Name of the user who sent the messsage.
+ * @param user Name of the user who sent the message.
  * @param msg The actual message.
  */
 void NetworkServerSendExternalChat(const std::string &source, TextColour colour, const std::string &user, const std::string &msg)
@@ -1926,7 +1926,7 @@ void NetworkServerShowStatusToConsole()
 	static const char * const stat_str[] = {
 		"inactive",
 		"authorizing",
-		"identifing client",
+		"identifying client",
 		"checking NewGRFs",
 		"authorized",
 		"waiting",

src/network/network_turn.cpp

@@ -91,7 +91,7 @@ void ClientNetworkTurnSocketHandler::Connect()
  * Not until you run Connect() on the resulting instance will it start setting
  * up the TURN connection.
  * @param token The token as received from the Game Coordinator.
- * @param tracking_number The tracking number as recieved from the Game Coordinator.
+ * @param tracking_number The tracking number as received from the Game Coordinator.
  * @param ticket The ticket as received from the Game Coordinator.
  * @param connection_string Connection string of the TURN server.
  * @return The handler for this TURN connection.

src/newgrf.cpp

@@ -4226,7 +4226,7 @@ static ChangeInfoResult ObjectChangeInfo(uint first, uint last, int prop, ByteRe
 				}
 				break;
 
-			case 0x0D: // Build cost multipler
+			case 0x0D: // Build cost multiplier
 				spec->build_cost_multiplier = buf.ReadByte();
 				spec->clear_cost_multiplier = spec->build_cost_multiplier;
 				break;

src/newgrf_cargo.cpp

@@ -79,7 +79,7 @@ uint16_t GetCargoCallback(CallbackID callback, uint32_t param1, uint32_t param2,
  */
 CargoType GetCargoTranslation(uint8_t cargo, const GRFFile *grffile, bool usebit)
 {
-	/* We can't use GetCargoTranslationTable here as the usebit flag changes behviour. */
+	/* We can't use GetCargoTranslationTable here as the usebit flag changes behaviour. */
 	/* Pre-version 7 uses the bitnum lookup from (standard in v8) instead of climate dependent in some places.. */
 	std::span<const CargoLabel> cargo_list;
 	if (grffile->grf_version < 7 && !usebit) {

src/newgrf_engine.cpp

@@ -1327,7 +1327,7 @@ static bool EnginePreSort(const EngineID &a, const EngineID &b)
 }
 
 /**
- * Deternine default engine sorting and execute recorded ListOrderChanges from AlterVehicleListOrder.
+ * Determine default engine sorting and execute recorded ListOrderChanges from AlterVehicleListOrder.
  */
 void CommitVehicleListOrderChanges()
 {

src/newgrf_house.cpp

@@ -373,7 +373,7 @@ static uint32_t GetDistanceFromNearbyHouse(uint8_t parameter, TileIndex tile, Ho
 /* virtual */ uint32_t HouseScopeResolver::GetVariable(uint8_t variable, [[maybe_unused]] uint32_t parameter, bool &available) const
 {
 	if (this->tile == INVALID_TILE) {
-		/* House does not yet exist, nor is it being planned to exist. Provide some default values intead. */
+		/* House does not yet exist, nor is it being planned to exist. Provide some default values instead. */
 		switch (variable) {
 			case 0x40: return TOWN_HOUSE_COMPLETED | this->view << 2; /* Construction stage. */
 			case 0x41: return 0;

src/newgrf_industries.cpp

@@ -193,7 +193,7 @@ static uint32_t GetCountAndDistanceOfClosestInstance(uint8_t param_setID, uint8_
 			/* Distance to the nearest water/land tile */
 			case 0x8B: return GetClosestWaterDistance(this->tile, !GetIndustrySpec(this->industry->type)->behaviour.Test(IndustryBehaviour::BuiltOnWater));
 
-			/* Square of Euclidian distance from town */
+			/* Square of Euclidean distance from town */
 			case 0x8D: return ClampTo<uint16_t>(DistanceSquare(this->industry->town->xy, this->tile));
 
 			/* 32 random bits */
@@ -294,7 +294,7 @@ static uint32_t GetCountAndDistanceOfClosestInstance(uint8_t param_setID, uint8_
 			TileIndex tile = GetNearbyTile(parameter, this->tile, true);
 			return GetTownRadiusGroup(this->industry->town, tile) << 16 | ClampTo<uint16_t>(DistanceManhattan(tile, this->industry->town->xy));
 		}
-		/* Get square of Euclidian distance of closest town */
+		/* Get square of Euclidean distance of closest town */
 		case 0x66: {
 			if (this->tile == INVALID_TILE) break;
 			TileIndex tile = GetNearbyTile(parameter, this->tile, true);

src/newgrf_object.cpp

@@ -327,7 +327,7 @@ static uint32_t GetCountAndDistanceOfClosestInstance(uint8_t local_id, uint32_t
 		/* Get town zone and Manhattan distance of closest town */
 		case 0x45: return GetTownRadiusGroup(t, this->tile) << 16 | ClampTo<uint16_t>(DistanceManhattan(this->tile, t->xy));
 
-		/* Get square of Euclidian distance of closest town */
+		/* Get square of Euclidean distance of closest town */
 		case 0x46: return DistanceSquare(this->tile, t->xy);
 
 		/* Object colour */

src/newgrf_roadstop.cpp

@@ -106,7 +106,7 @@ uint32_t RoadStopScopeResolver::GetVariable(uint8_t variable, [[maybe_unused]] u
 			return t != nullptr ? (GetTownRadiusGroup(t, this->tile) << 16 | ClampTo<uint16_t>(DistanceManhattan(this->tile, t->xy))) : HZB_TOWN_EDGE << 16;
 		}
 
-		/* Get square of Euclidian distance of closest town */
+		/* Get square of Euclidean distance of closest town */
 		case 0x46: {
 			if (this->tile == INVALID_TILE) return 0;
 			const Town *t = (this->st == nullptr) ? ClosestTownFromTile(this->tile, UINT_MAX) : this->st->town;

src/news_gui.cpp

@@ -52,7 +52,7 @@ static NewsContainer _news; ///< List of news, with newest items at the start.
 /**
  * Forced news item.
  * Users can force an item by accessing the history or "last message".
- * If the message being shown was forced by the user, an iterater is stored
+ * If the message being shown was forced by the user, an iterator is stored
  * in _forced_news. Otherwise, \a _forced_news variable is the end of \a _news.
  */
 static NewsIterator _forced_news = std::end(_news);
@@ -903,7 +903,7 @@ void AddNewsItem(StringID string, NewsType type, NewsStyle style, NewsFlags flag
 	/* Create new news item node */
 	_news.emplace_front(string, type, style, flags, reftype1, ref1, reftype2, ref2, std::move(data), advice_type);
 
-	/* Keep the number of stored news items to a managable number */
+	/* Keep the number of stored news items to a manageable number */
 	if (std::size(_news) > MAX_NEWS_AMOUNT) {
 		DeleteNewsItem(std::prev(std::end(_news)));
 	}

src/os/macosx/font_osx.h

@@ -16,7 +16,7 @@
 #include <CoreFoundation/CoreFoundation.h>
 
 class CoreTextFontCache : public TrueTypeFontCache {
-	CFAutoRelease<CTFontDescriptorRef> font_desc; ///< Font descriptor exlcuding font size.
+	CFAutoRelease<CTFontDescriptorRef> font_desc; ///< Font descriptor excluding font size.
 	CFAutoRelease<CTFontRef> font;                ///< CoreText font handle.
 
 	std::string font_name;                        ///< Cached font name.

src/os/macosx/string_osx.cpp

@@ -196,7 +196,7 @@ static CTRunDelegateCallbacks _sprite_font_callback = {
 		for (ssize_t c = last; c < position; c++) {
 			if (buff[c] >= SCC_SPRITE_START && buff[c] <= SCC_SPRITE_END && font->fc->MapCharToGlyph(buff[c], false) == 0) {
 				CFAutoRelease<CTRunDelegateRef> del(CTRunDelegateCreate(&_sprite_font_callback, (void *)(size_t)(buff[c] | (font->fc->GetSize() << 24))));
-				/* According to the offical documentation, if a run delegate is used, the char should always be 0xFFFC. */
+				/* According to the official documentation, if a run delegate is used, the char should always be 0xFFFC. */
 				CFAttributedStringReplaceString(str.get(), CFRangeMake(c, 1), replacment_str.get());
 				CFAttributedStringSetAttribute(str.get(), CFRangeMake(c, 1), kCTRunDelegateAttributeName, del.get());
 			}

src/palette.cpp

@@ -30,7 +30,7 @@ static std::recursive_mutex _palette_mutex; ///< To coordinate access to _cur_pa
  * a smaller lookup table.
  *
  * 6 bpc is chosen as this results in a palette lookup table of 256KiB with adequate fidelty.
- * In constract, a 5 bpc lookup table would be 32KiB, and 7 bpc would be 2MiB.
+ * In contrast, a 5 bpc lookup table would be 32KiB, and 7 bpc would be 2MiB.
  *
  * Values in the table are filled as they are first encountered -- larger lookup table means more colour
  * distance calculations, and is therefore slower.

src/pathfinder/water_regions.cpp

@@ -331,10 +331,10 @@ void InvalidateWaterRegion(TileIndex tile)
  * Calls the provided callback function for all water region patches
  * accessible from one particular side of the starting patch.
  * @param water_region_patch Water patch within the water region to start searching from
- * @param side Side of the water region to look for neigboring patches of water
+ * @param side Side of the water region to look for neighbouring patches of water
- * @param callback The function that will be called for each neighbor that is found
+ * @param callback The function that will be called for each neighbour that is found
  */
-static inline void VisitAdjacentWaterRegionPatchNeighbors(const WaterRegionPatchDesc &water_region_patch, DiagDirection side, TVisitWaterRegionPatchCallBack &func)
+static inline void VisitAdjacentWaterRegionPatchNeighbours(const WaterRegionPatchDesc &water_region_patch, DiagDirection side, TVisitWaterRegionPatchCallBack &func)
 {
 	if (water_region_patch.label == INVALID_WATER_REGION_PATCH) return;
 
@@ -346,15 +346,15 @@ static inline void VisitAdjacentWaterRegionPatchNeighbors(const WaterRegionPatch
 
 	if (nx < 0 || ny < 0 || nx >= GetWaterRegionMapSizeX() || ny >= GetWaterRegionMapSizeY()) return;
 
-	const WaterRegion neighboring_region = GetUpdatedWaterRegion(nx, ny);
+	const WaterRegion neighbouring_region = GetUpdatedWaterRegion(nx, ny);
 	const DiagDirection opposite_side = ReverseDiagDir(side);
 
 	/* Indicates via which local x or y coordinates (depends on the "side" parameter) we can cross over into the adjacent region. */
 	const TWaterRegionTraversabilityBits traversability_bits = current_region.GetEdgeTraversabilityBits(side)
-		& neighboring_region.GetEdgeTraversabilityBits(opposite_side);
+		& neighbouring_region.GetEdgeTraversabilityBits(opposite_side);
 	if (traversability_bits == 0) return;
 
-	if (current_region.NumberOfPatches() == 1 && neighboring_region.NumberOfPatches() == 1) {
+	if (current_region.NumberOfPatches() == 1 && neighbouring_region.NumberOfPatches() == 1) {
 		func(WaterRegionPatchDesc{ nx, ny, FIRST_REGION_LABEL }); // No further checks needed because we know there is just one patch for both adjacent regions
 		return;
 	}
@@ -369,10 +369,10 @@ static inline void VisitAdjacentWaterRegionPatchNeighbors(const WaterRegionPatch
 		const TWaterRegionPatchLabel current_label = current_region.GetLabel(current_edge_tile);
 		if (current_label != water_region_patch.label) continue;
 
-		const TileIndex neighbor_edge_tile = GetEdgeTileCoordinate(nx, ny, opposite_side, x_or_y);
+		const TileIndex neighbour_edge_tile = GetEdgeTileCoordinate(nx, ny, opposite_side, x_or_y);
-		const TWaterRegionPatchLabel neighbor_label = neighboring_region.GetLabel(neighbor_edge_tile);
+		const TWaterRegionPatchLabel neighbour_label = neighbouring_region.GetLabel(neighbour_edge_tile);
-		assert(neighbor_label != INVALID_WATER_REGION_PATCH);
+		assert(neighbour_label != INVALID_WATER_REGION_PATCH);
-		if (std::ranges::find(unique_labels, neighbor_label) == unique_labels.end()) unique_labels.push_back(neighbor_label);
+		if (std::ranges::find(unique_labels, neighbour_label) == unique_labels.end()) unique_labels.push_back(neighbour_label);
 	}
 	for (TWaterRegionPatchLabel unique_label : unique_labels) func(WaterRegionPatchDesc{ nx, ny, unique_label });
 }
@@ -383,16 +383,16 @@ static inline void VisitAdjacentWaterRegionPatchNeighbors(const WaterRegionPatch
  * @param water_region_patch Water patch within the water region to start searching from
  * @param callback The function that will be called for each accessible water patch that is found
  */
-void VisitWaterRegionPatchNeighbors(const WaterRegionPatchDesc &water_region_patch, TVisitWaterRegionPatchCallBack &callback)
+void VisitWaterRegionPatchNeighbours(const WaterRegionPatchDesc &water_region_patch, TVisitWaterRegionPatchCallBack &callback)
 {
 	if (water_region_patch.label == INVALID_WATER_REGION_PATCH) return;
 
 	const WaterRegion current_region = GetUpdatedWaterRegion(water_region_patch.x, water_region_patch.y);
 
 	/* Visit adjacent water region patches in each cardinal direction */
-	for (DiagDirection side = DIAGDIR_BEGIN; side < DIAGDIR_END; side++) VisitAdjacentWaterRegionPatchNeighbors(water_region_patch, side, callback);
+	for (DiagDirection side = DIAGDIR_BEGIN; side < DIAGDIR_END; side++) VisitAdjacentWaterRegionPatchNeighbours(water_region_patch, side, callback);
 
-	/* Visit neigboring water patches accessible via cross-region aqueducts */
+	/* Visit neighbouring water patches accessible via cross-region aqueducts */
 	if (current_region.HasCrossRegionAqueducts()) {
 		for (const TileIndex tile : current_region) {
 			if (GetWaterRegionPatchInfo(tile) == water_region_patch && IsAqueductTile(tile)) {

src/pathfinder/water_regions.h

@@ -57,7 +57,7 @@ WaterRegionPatchDesc GetWaterRegionPatchInfo(TileIndex tile);
 void InvalidateWaterRegion(TileIndex tile);
 
 using TVisitWaterRegionPatchCallBack = std::function<void(const WaterRegionPatchDesc &)>;
-void VisitWaterRegionPatchNeighbors(const WaterRegionPatchDesc &water_region_patch, TVisitWaterRegionPatchCallBack &callback);
+void VisitWaterRegionPatchNeighbours(const WaterRegionPatchDesc &water_region_patch, TVisitWaterRegionPatchCallBack &callback);
 
 void AllocateWaterRegions();
 

src/pathfinder/yapf/yapf_rail.cpp

@@ -114,7 +114,7 @@ private:
 		return tile != this->res_dest_tile || td != this->res_dest_td;
 	}
 
-	/** Unreserve a single track/platform. Stops when the previous failer is reached. */
+	/** Unreserve a single track/platform. Stops when the previous failure is reached. */
 	bool UnreserveSingleTrack(TileIndex tile, Trackdir td)
 	{
 		if (IsRailStationTile(tile)) {

src/pathfinder/yapf/yapf_ship_regions.cpp

@@ -16,7 +16,7 @@
 
 #include "../../safeguards.h"
 
-constexpr int DIRECT_NEIGHBOR_COST = 100;
+constexpr int DIRECT_NEIGHBOUR_COST = 100;
 constexpr int NODES_PER_REGION = 4;
 constexpr int MAX_NUMBER_OF_NODES = 65536;
 
@@ -35,7 +35,7 @@ struct CYapfRegionPatchNodeKey {
 
 inline uint ManhattanDistance(const CYapfRegionPatchNodeKey &a, const CYapfRegionPatchNodeKey &b)
 {
-	return (std::abs(a.water_region_patch.x - b.water_region_patch.x) + std::abs(a.water_region_patch.y - b.water_region_patch.y)) * DIRECT_NEIGHBOR_COST;
+	return (std::abs(a.water_region_patch.x - b.water_region_patch.x) + std::abs(a.water_region_patch.y - b.water_region_patch.y)) * DIRECT_NEIGHBOUR_COST;
 }
 
 /** Yapf Node for water regions. */
@@ -170,7 +170,7 @@ public:
 			node.Set(&old_node, water_region_patch);
 			Yapf().AddNewNode(node, TrackFollower{});
 		};
-		VisitWaterRegionPatchNeighbors(old_node.key.water_region_patch, visitFunc);
+		VisitWaterRegionPatchNeighbours(old_node.key.water_region_patch, visitFunc);
 	}
 
 	inline char TransportTypeChar() const { return '^'; }

src/road.cpp

@@ -48,9 +48,9 @@ RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 {
 	if (!IsValidTile(tile)) return ROAD_NONE;
 	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
-		const TileIndex neighbor_tile = TileAddByDiagDir(tile, dir);
+		const TileIndex neighbour_tile = TileAddByDiagDir(tile, dir);
 
-		/* Get the Roadbit pointing to the neighbor_tile */
+		/* Get the Roadbit pointing to the neighbour_tile */
 		const RoadBits target_rb = DiagDirToRoadBits(dir);
 
 		/* If the roadbit is in the current plan */
@@ -58,8 +58,8 @@ RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 			bool connective = false;
 			const RoadBits mirrored_rb = MirrorRoadBits(target_rb);
 
-			if (IsValidTile(neighbor_tile)) {
+			if (IsValidTile(neighbour_tile)) {
-				switch (GetTileType(neighbor_tile)) {
+				switch (GetTileType(neighbour_tile)) {
 					/* Always connective ones */
 					case MP_CLEAR: case MP_TREES:
 						connective = true;
@@ -69,24 +69,24 @@ RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 					case MP_TUNNELBRIDGE:
 					case MP_STATION:
 					case MP_ROAD:
-						if (IsNormalRoadTile(neighbor_tile)) {
+						if (IsNormalRoadTile(neighbour_tile)) {
 							/* Always connective */
 							connective = true;
 						} else {
-							const RoadBits neighbor_rb = GetAnyRoadBits(neighbor_tile, RTT_ROAD) | GetAnyRoadBits(neighbor_tile, RTT_TRAM);
+							const RoadBits neighbour_rb = GetAnyRoadBits(neighbour_tile, RTT_ROAD) | GetAnyRoadBits(neighbour_tile, RTT_TRAM);
 
 							/* Accept only connective tiles */
-							connective = (neighbor_rb & mirrored_rb) != ROAD_NONE;
+							connective = (neighbour_rb & mirrored_rb) != ROAD_NONE;
 						}
 						break;
 
 					case MP_RAILWAY:
-						connective = IsPossibleCrossing(neighbor_tile, DiagDirToAxis(dir));
+						connective = IsPossibleCrossing(neighbour_tile, DiagDirToAxis(dir));
 						break;
 
 					case MP_WATER:
 						/* Check for real water tile */
-						connective = !IsWater(neighbor_tile);
+						connective = !IsWater(neighbour_tile);
 						break;
 
 					/* The definitely not connective ones */
@@ -94,7 +94,7 @@ RoadBits CleanUpRoadBits(const TileIndex tile, RoadBits org_rb)
 				}
 			}
 
-			/* If the neighbor tile is inconnective, remove the planned road connection to it */
+			/* If the neighbour tile is inconnective, remove the planned road connection to it */
 			if (!connective) org_rb ^= target_rb;
 		}
 	}

src/saveload/oldloader.h

@@ -5,7 +5,7 @@
  * 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 oldloader.h Declarations of strctures and function used in loader of old savegames */
+/** @file oldloader.h Declarations of structures and functions used in loader of old savegames */
 
 #ifndef OLDLOADER_H
 #define OLDLOADER_H

src/saveload/oldloader_sl.cpp

@@ -501,7 +501,7 @@ static Town *RemapTown(TileIndex fallback)
 	/* In some cases depots, industries and stations could refer to a missing town. */
 	Town *t = Town::GetIfValid(RemapTownIndex(_old_town_index));
 	if (t == nullptr) {
-		/* In case the town that was refered to does not exist, find the closest.
+		/* In case the town that was referred to does not exist, find the closest.
 		 * However, this needs the kd-tree to be present. */
 		RebuildTownKdtree();
 		t = CalcClosestTownFromTile(fallback);

src/script/api/script_event_types.cpp

@@ -122,7 +122,7 @@ ScriptEventAdminPort::ScriptEventAdminPort(const std::string &json) :
 {
 }
 /**
- * Convert a JSON part fo Squirrel.
+ * Convert a JSON part for Squirrel.
  * @param vm The VM used.
  * @param json The JSON part to convert to Squirrel.
  */

src/script/api/script_objecttype.hpp

@@ -46,7 +46,7 @@ public:
 	/**
 	 * Build an object of the specified type.
 	 * @param object_type The type of the object to build.
-	 * @param view The view for teh object.
+	 * @param view The view for the object.
 	 * @param tile The tile to build the object on.
 	 * @pre IsValidObjectType(object_type).
 	 * @return True if the object was successfully build.

src/script/api/script_road.hpp

@@ -72,8 +72,8 @@ public:
 	 * Type of road station.
 	 */
 	enum RoadVehicleType {
-		ROADVEHTYPE_BUS,   ///< Build objects useable for busses and passenger trams
+		ROADVEHTYPE_BUS,   ///< Build objects usable for busses and passenger trams
-		ROADVEHTYPE_TRUCK, ///< Build objects useable for trucks and cargo trams
+		ROADVEHTYPE_TRUCK, ///< Build objects usable for trucks and cargo trams
 	};
 
 	/**

src/script/api/script_story_page.hpp

@@ -50,7 +50,7 @@ public:
 		SPET_GOAL = ::SPET_GOAL,                     ///< An element that displays a goal.
 		SPET_BUTTON_PUSH = ::SPET_BUTTON_PUSH,       ///< A push button that triggers an immediate event.
 		SPET_BUTTON_TILE = ::SPET_BUTTON_TILE,       ///< A button that allows the player to select a tile, and triggers an event with the tile.
-		SPET_BUTTON_VEHICLE = ::SPET_BUTTON_VEHICLE, ///< A button that allows the player to select a vehicle, and triggers an event wih the vehicle.
+		SPET_BUTTON_VEHICLE = ::SPET_BUTTON_VEHICLE, ///< A button that allows the player to select a vehicle, and triggers an event with the vehicle.
 	};
 
 	/**

src/ship_cmd.cpp

@@ -167,7 +167,7 @@ static const Depot *FindClosestShipDepot(const Vehicle *v, uint max_distance)
 		const WaterRegionPatchDesc current_node = patches_to_search.front();
 		patches_to_search.pop_front();
 
-		/* Add neighbors of the current patch to the search queue. */
+		/* Add neighbours of the current patch to the search queue. */
 		TVisitWaterRegionPatchCallBack visitFunc = [&](const WaterRegionPatchDesc &water_region_patch) {
 			/* Note that we check the max distance per axis, not the total distance. */
 			if (std::abs(water_region_patch.x - start_patch.x) > max_region_distance ||
@@ -180,7 +180,7 @@ static const Depot *FindClosestShipDepot(const Vehicle *v, uint max_distance)
 			}
 		};
 
-		VisitWaterRegionPatchNeighbors(current_node, visitFunc);
+		VisitWaterRegionPatchNeighbours(current_node, visitFunc);
 	}
 
 	/* Step 2: Find the closest depot within the reachable Water Region Patches. */

src/sprite.h

@@ -138,7 +138,7 @@ inline void DrawNewGRFTileSeqInGUI(int x, int y, const DrawTileSprites *dts, uin
 /**
  * Applies PALETTE_MODIFIER_TRANSPARENT and PALETTE_MODIFIER_COLOUR to a palette entry of a sprite layout entry
  * @note for ground sprites use #GroundSpritePaletteTransform
- * @note Not useable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
+ * @note Not usable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
  *       when to use the default palette.
  *
  * @param image The sprite to draw
@@ -157,7 +157,7 @@ inline PaletteID SpriteLayoutPaletteTransform(SpriteID image, PaletteID pal, Pal
 
 /**
  * Applies PALETTE_MODIFIER_COLOUR to a palette entry of a ground sprite
- * @note Not useable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
+ * @note Not usable for OTTD internal spritelayouts from table/xxx_land.h as PALETTE_MODIFIER_TRANSPARENT is only set
  *       when to use the default palette.
  *
  * @param image The sprite to draw

src/station_base.h

@@ -612,7 +612,7 @@ void RebuildStationKdtree();
 
 /**
  * Call a function on all stations that have any part of the requested area within their catchment.
- * @tparam Func The type of funcion to call
+ * @tparam Func The type of function to call
  * @param area The TileArea to check
  * @param func The function to call, must take two parameters: Station* and TileIndex and return true
  *             if coverage of that tile is acceptable for a given station or false if search should continue

src/stdafx.h

@@ -194,7 +194,7 @@
 
 /*
  * When making a (pure) debug build, the compiler will by default disable
- * inlining of functions. This has a detremental effect on the performance of
+ * inlining of functions. This has a detrimental effect on the performance of
  * debug builds, especially when more and more trivial (wrapper) functions get
  * added to the code base.
  * Take for example the savegame called "Wentbourne", when running this game

src/story_base.h

@@ -33,7 +33,7 @@ enum StoryPageElementType : uint8_t {
 	SPET_GOAL,           ///< An element that references a goal.
 	SPET_BUTTON_PUSH,    ///< A push button that triggers an immediate event.
 	SPET_BUTTON_TILE,    ///< A button that allows the player to select a tile, and triggers an event with the tile.
-	SPET_BUTTON_VEHICLE, ///< A button that allows the player to select a vehicle, and triggers an event wih the vehicle.
+	SPET_BUTTON_VEHICLE, ///< A button that allows the player to select a vehicle, and triggers an event with the vehicle.
 	SPET_END,
 	INVALID_SPET = 0xFF,
 };

src/table/settings/old_gameopt_settings.ini

@@ -8,7 +8,7 @@
 ; under "gameopts" in the configuration file, but no longer are. Most of these
 ; are now moved to other places.
 ;
-; For backwards compatability, this file dictates how both were saved. When
+; For backwards compatibility, this file dictates how both were saved. When
 ; a configuration files contains these entries, they are read once, and removed
 ; from the configuration file afterwards. Those that are still supported will
 ; be saved in their new place.

src/tests/mock_environment.h

@@ -13,7 +13,7 @@
 #include "mock_fontcache.h"
 #include "mock_spritecache.h"
 
-/** Singleton class to set up the mock environemnt once. */
+/** Singleton class to set up the mock environment once. */
 class MockEnvironment {
 public:
 	static MockEnvironment &Instance()

src/tests/string_func.cpp

@@ -431,7 +431,7 @@ static void ComposePart(std::back_insert_iterator<std::string> &output, const st
 	for (const auto &c : value) *output = c;
 }
 
-/* Helper to compose a string from unicde or string parts. */
+/* Helper to compose a string from unicode or string parts. */
 template <typename... Args>
 static std::string Compose(Args &&... args)
 {

src/tests/strings_func.cpp

@@ -45,7 +45,7 @@ TEST_CASE("HaveDParamChanged")
 	SetDParamStr(1, "some string");
 	CHECK(HaveDParamChanged(backup) == false);
 
-	/* Changing paramter 2 should not have any effect, as the backup is only 2 long. */
+	/* Changing parameter 2 should not have any effect, as the backup is only 2 long. */
 	SetDParam(2, 3);
 	CHECK(HaveDParamChanged(backup) == false);
 

src/tests/test_network_crypto.cpp

@@ -261,11 +261,11 @@ TEST_CASE("Encryption handling")
 	MockNetworkSocketHandler server_socket_handler(server.CreateClientToServerEncryptionHandler(), server.CreateServerToClientEncryptionHandler());
 	MockNetworkSocketHandler client_socket_handler(client.CreateServerToClientEncryptionHandler(), client.CreateClientToServerEncryptionHandler());
 
-	SECTION("Encyption happening client -> server") {
+	SECTION("Encryption happening client -> server") {
 		CheckEncryption(&client_socket_handler, &server_socket_handler);
 	}
 
-	SECTION("Encyption happening server -> client") {
+	SECTION("Encryption happening server -> client") {
 		CheckEncryption(&server_socket_handler, &client_socket_handler);
 	}
 

src/tgp.cpp

@@ -658,7 +658,7 @@ static void HeightMapCurves(uint level)
 			/* Apply interpolation of curve map results. */
 			*h = (Height)((ht[corner_a] * yri + ht[corner_b] * yr) * xri + (ht[corner_c] * yri + ht[corner_d] * yr) * xr);
 
-			/* Readd sea level */
+			/* Re-add sea level */
 			*h += I2H(1);
 		}
 	}
@@ -799,10 +799,10 @@ static void HeightMapSmoothCoastInDirection(int org_x, int org_y, int dir_x, int
 		/* Coast found? */
 		if (_height_map.height(x, y) >= I2H(1)) break;
 
-		/* Coast found in the neighborhood? */
+		/* Coast found in the neighbourhood? */
 		if (IsValidXY(x + dir_y, y + dir_x) && _height_map.height(x + dir_y, y + dir_x) > 0) break;
 
-		/* Coast found in the neighborhood on the other side */
+		/* Coast found in the neighbourhood on the other side */
 		if (IsValidXY(x - dir_y, y - dir_x) && _height_map.height(x - dir_y, y - dir_x) > 0) break;
 	}
 

src/tile_map.cpp

@@ -13,7 +13,7 @@
 #include "safeguards.h"
 
 /**
- * Get a tile's slope given the heigh of its four corners.
+ * Get a tile's slope given the height of its four corners.
  * @param hnorth The height at the northern corner in the same unit as TileHeight.
  * @param hwest  The height at the western corner in the same unit as TileHeight.
  * @param heast  The height at the eastern corner in the same unit as TileHeight.

src/town_cmd.cpp

@@ -573,13 +573,13 @@ static void TownGenerateCargoOriginal(Town *t, TownProductionEffect tpe, uint8_t
 }
 
 /**
- * Generate cargo for a house using the binominal algorithm.
+ * Generate cargo for a house using the binomial algorithm.
  * @param t The current town.
  * @param tpe The town production effect.
  * @param rate The town's product rate for this production.
  * @param stations Available stations for this house.
  */
-static void TownGenerateCargoBinominal(Town *t, TownProductionEffect tpe, uint8_t rate, StationFinder &stations)
+static void TownGenerateCargoBinomial(Town *t, TownProductionEffect tpe, uint8_t rate, StationFinder &stations)
 {
 	for (const CargoSpec *cs : CargoSpec::town_production_cargoes[tpe]) {
 		CargoType cargo_type = cs->Index();
@@ -659,8 +659,8 @@ static void TileLoop_Town(TileIndex tile)
 				/* Reduce generation rate to a 1/4, using tile bits to spread out distribution.
 				 * As tick counter is incremented by 256 between each call, we ignore the lower 8 bits. */
 				if (GB(TimerGameTick::counter, 8, 2) == GB(tile.base(), 0, 2)) {
-					TownGenerateCargoBinominal(t, TPE_PASSENGERS, hs->population, stations);
+					TownGenerateCargoBinomial(t, TPE_PASSENGERS, hs->population, stations);
-					TownGenerateCargoBinominal(t, TPE_MAIL, hs->mail_generation, stations);
+					TownGenerateCargoBinomial(t, TPE_MAIL, hs->mail_generation, stations);
 				}
 				break;
 
@@ -1038,7 +1038,7 @@ bool CheckTownRoadTypes()
  * @param dist_multi The distance multiplier.
  * @return true if there is a parallel road.
  */
-static bool IsNeighborRoadTile(TileIndex tile, const DiagDirection dir, uint dist_multi)
+static bool IsNeighbourRoadTile(TileIndex tile, const DiagDirection dir, uint dist_multi)
 {
 	if (!IsValidTile(tile)) return false;
 
@@ -1092,7 +1092,7 @@ static bool IsRoadAllowedHere(Town *t, TileIndex tile, DiagDirection dir)
 	}
 
 	Slope cur_slope = _settings_game.construction.build_on_slopes ? std::get<0>(GetFoundationSlope(tile)) : GetTileSlope(tile);
-	bool ret = !IsNeighborRoadTile(tile, dir, t->layout == TL_ORIGINAL ? 1 : 2);
+	bool ret = !IsNeighbourRoadTile(tile, dir, t->layout == TL_ORIGINAL ? 1 : 2);
 	if (cur_slope == SLOPE_FLAT) return ret;
 
 	/* If the tile is not a slope in the right direction, then
@@ -1200,7 +1200,7 @@ static RoadBits GetTownRoadGridElement(Town *t, TileIndex tile, DiagDirection di
 
 /**
  * Grows the town with an extra house.
- *  Check if there are enough neighbor house tiles
+ *  Check if there are enough neighbour house tiles
  *  next to the current tile. If there are enough
  *  add another house.
  *
@@ -1213,7 +1213,7 @@ static bool GrowTownWithExtraHouse(Town *t, TileIndex tile)
 	/* We can't look further than that. */
 	if (DistanceFromEdge(tile) == 0) return false;
 
-	uint counter = 0; // counts the house neighbor tiles
+	uint counter = 0; // counts the house neighbour tiles
 
 	/* Check the tiles E,N,W and S of the current tile for houses */
 	for (DiagDirection dir = DIAGDIR_BEGIN; dir < DIAGDIR_END; dir++) {
@@ -1230,7 +1230,7 @@ static bool GrowTownWithExtraHouse(Town *t, TileIndex tile)
 				break;
 		}
 
-		/* If there are enough neighbors stop here */
+		/* If there are enough neighbours stop here */
 		if (counter >= 3) {
 			if (TryBuildTownHouse(t, tile)) {
 				_grow_town_result = GROWTH_SUCCEED;
@@ -1995,7 +1995,7 @@ void UpdateTownRadius(Town *t)
 }
 
 /**
- * Update the maximum amount of montly passengers and mail for a town, based on its population.
+ * Update the maximum amount of monthly passengers and mail for a town, based on its population.
  * @param t The town to update.
  */
 void UpdateTownMaxPass(Town *t)
@@ -2934,7 +2934,7 @@ CommandCost CmdPlaceHouse(DoCommandFlag flags, TileIndex tile, HouseID house, bo
 	if (hs->building_flags.Test(BuildingFlag::Size2x1)) ta.Add(TileAddByDiagDir(tile, DIAGDIR_SW));
 	if (hs->building_flags.Test(BuildingFlag::Size1x2)) ta.Add(TileAddByDiagDir(tile, DIAGDIR_SE));
 
-	/* Check additonal tiles covered by this house. */
+	/* Check additional tiles covered by this house. */
 	for (const TileIndex &subtile : ta) {
 		cost = Command<CMD_LANDSCAPE_CLEAR>::Do(DC_AUTO | DC_NO_WATER, subtile);
 		if (!cost.Succeeded()) return cost;

src/town_gui.cpp

@@ -87,7 +87,7 @@ private:
 	StringID action_tooltips[TACT_COUNT];
 
 	Dimension icon_size;      ///< Dimensions of company icon
-	Dimension exclusive_size; ///< Dimensions of exlusive icon
+	Dimension exclusive_size; ///< Dimensions of exclusive icon
 
 	/**
 	 * Get the position of the Nth set bit.

src/vehicle.cpp

@@ -772,7 +772,7 @@ uint32_t Vehicle::GetGRFID() const
 /**
  * Shift all dates by given interval.
  * This is useful if the date has been modified with the cheat menu.
- * @param interval Number of days to be added or substracted.
+ * @param interval Number of days to be added or subtracted.
  */
 void Vehicle::ShiftDates(TimerGameEconomy::Date interval)
 {

src/video/cocoa/cocoa_ogl.mm

@@ -48,7 +48,7 @@ static Palette _local_palette; ///< Current palette to use for drawing.
  * Read http://developer.apple.com/releasenotes/Cocoa/Objective-C++.html for more information.
  */
 
-/** Platform-specific callback to get an OpenGL funtion pointer. */
+/** Platform-specific callback to get an OpenGL function pointer. */
 static OGLProc GetOGLProcAddressCallback(const char *proc)
 {
 	static void *dl = nullptr;

src/video/sdl2_opengl_v.cpp

@@ -42,7 +42,7 @@
 
 static FVideoDriver_SDL_OpenGL iFVideoDriver_SDL_OpenGL;
 
-/** Platform-specific callback to get an OpenGL funtion pointer. */
+/** Platform-specific callback to get an OpenGL function pointer. */
 static OGLProc GetOGLProcAddressCallback(const char *proc)
 {
 	return reinterpret_cast<OGLProc>(SDL_GL_GetProcAddress(proc));

src/viewport.cpp

@@ -1515,7 +1515,7 @@ static void ViewportAddKdtreeSigns(DrawPixelInfo *dpi)
  * @param center the (preferred) center of the viewport sign
  * @param top    the new top of the sign
  * @param str    the string to show in the sign
- * @param str_small the string to show when zoomed out. If the string is emtpy then the \a str is used.
+ * @param str_small the string to show when zoomed out. If the string is empty then the \a str is used.
  */
 void ViewportSign::UpdatePosition(int center, int top, std::string_view str, std::string_view str_small)
 {
@@ -1607,7 +1607,7 @@ static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
 	sprite_list.sort();
 
 	std::vector<ParentSpriteToDraw *> preceding;  // Temporarily stores sprites that precede current and their position in the list
-	auto preceding_prev = sprite_list.begin(); // Store iterator in case we need to delete a single preciding sprite
+	auto preceding_prev = sprite_list.begin(); // Store iterator in case we need to delete a single preceding sprite
 	auto out = psdv->begin();  // Iterator to output sorted sprites
 
 	while (!sprite_order.empty()) {
@@ -1630,7 +1630,7 @@ static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
 		/* We only need sprites with xmin <= s->xmax && ymin <= s->ymax && zmin <= s->zmax
 		 * So by iterating sprites with xmin + ymin <= s->xmax + s->ymax
 		 * we get all we need and some more that we filter out later.
-		 * We don't include zmin into the sum as there are usually more neighbors on x and y than z
+		 * We don't include zmin into the sum as there are usually more neighbours on x and y than z
 		 * so including it will actually increase the amount of false positives.
 		 * Also min coordinates can be > max so using max(xmin, xmax) + max(ymin, ymax)
 		 * to ensure that we iterate the current sprite as we need to remove it from the list.

src/viewport_sprite_sorter_sse4.cpp

@@ -56,7 +56,7 @@ void ViewportSortParentSpritesSSE41(ParentSpriteToSortVector *psdv)
 	sprite_list.sort();
 
 	std::vector<ParentSpriteToDraw *> preceding;  // Temporarily stores sprites that precede current and their position in the list
-	auto preceding_prev = sprite_list.begin(); // Store iterator in case we need to delete a single preciding sprite
+	auto preceding_prev = sprite_list.begin(); // Store iterator in case we need to delete a single preceding sprite
 	auto out = psdv->begin();  // Iterator to output sorted sprites
 
 	while (!sprite_order.empty()) {
@@ -79,7 +79,7 @@ void ViewportSortParentSpritesSSE41(ParentSpriteToSortVector *psdv)
 		/* We only need sprites with xmin <= s->xmax && ymin <= s->ymax && zmin <= s->zmax
 		 * So by iterating sprites with xmin + ymin <= s->xmax + s->ymax
 		 * we get all we need and some more that we filter out later.
-		 * We don't include zmin into the sum as there are usually more neighbors on x and y than z
+		 * We don't include zmin into the sum as there are usually more neighbours on x and y than z
 		 * so including it will actually increase the amount of false positives.
 		 * Also min coordinates can be > max so using max(xmin, xmax) + max(ymin, ymax)
 		 * to ensure that we iterate the current sprite as we need to remove it from the list.

src/widget_type.h

@@ -89,7 +89,7 @@ enum WidgetType : uint8_t {
 	WPT_TEXTSTYLE,    ///< Widget part for specifying text colour.
 	WPT_ALIGNMENT,    ///< Widget part for specifying text/image alignment.
 	WPT_SCROLLBAR,    ///< Widget part for attaching a scrollbar.
-	WPT_ASPECT,       ///< Widget part for sepcifying aspect ratio.
+	WPT_ASPECT,       ///< Widget part for specifying aspect ratio.
 	WPT_ATTRIBUTE_END, ///< End marker for attribute NWidgetPart types.
 
 	WPT_FUNCTION, ///< Widget part for calling a user function.
@@ -479,7 +479,7 @@ public:
 	NWidgetBase *GetWidgetOfType(WidgetType tp) override;
 
 protected:
-	std::vector<std::unique_ptr<NWidgetBase>> children; ///< Child widgets in contaier.
+	std::vector<std::unique_ptr<NWidgetBase>> children; ///< Child widgets in container.
 };
 
 /** Display planes with zero size for #NWidgetStacked. */
@@ -493,7 +493,7 @@ enum StackedZeroSizePlanes : int {
 
 /**
  * Stacked widgets, widgets all occupying the same space in the window.
- * #NWID_SELECTION allows for selecting one of several panels (planes) to tbe displayed. All planes must have the same size.
+ * #NWID_SELECTION allows for selecting one of several panels (planes) to be displayed. All planes must have the same size.
  * Since all planes are also initialized, switching between different planes can be done while the window is displayed.
  *
  * There are also a number of special planes (defined in #StackedZeroSizePlanes) that have zero size in one direction (and are stretchable in
@@ -874,7 +874,7 @@ public:
 	 * @param widget      Widget number of the widget clicked in.
 	 * @param padding     Amount of empty space between the widget edge and the top of the first row. Default value is \c 0.
 	 * @param line_height Height of a single row. A negative value means using the vertical resize step of the widget.
-	 * @return Iterator to the element clicked at. If clicked at a wrong position, returns as interator to the end of the container.
+	 * @return Iterator to the element clicked at. If clicked at a wrong position, returns an iterator to the end of the container.
 	 */
 	template <typename Tcontainer>
 	auto GetScrolledItemFromWidget(Tcontainer &container, int clickpos, const Window * const w, WidgetID widget, int padding = 0, int line_height = -1) const
@@ -978,7 +978,7 @@ inline uint ComputeMaxSize(uint base, uint max_space, uint step)
  *   - #SetPadding Define additional padding around the container.
  *   - #SetPIP Set additional pre/inter/post child widget space.
  *   .
- *   Underneath these properties, all child widgets of the container must be defined. To denote that they are childs, add an indent before the nested widget parts of
+ *   Underneath these properties, all child widgets of the container must be defined. To denote that they are children, add an indent before the nested widget parts of
  *   the child widgets (it has no meaning for the compiler but it makes the widget parts easier to read).
  *   Below the last child widget, use an #EndContainer part. This part should be aligned with the #NWidget part that started the container.
  *

src/window_gui.h

@@ -60,7 +60,7 @@ public:
 	int vsep_wide;            ///< Wide vertical spacing.
 	int hsep_normal;          ///< Normal horizontal spacing.
 	int hsep_wide;            ///< Wide horizontal spacing.
-	int hsep_indent;          ///< Width of identation for tree layouts.
+	int hsep_indent;          ///< Width of indentation for tree layouts.
 
 	static const WidgetDimensions unscaled; ///< Unscaled widget dimensions.
 	static WidgetDimensions scaled;         ///< Widget dimensions scaled for current zoom level.
@@ -899,7 +899,7 @@ public:
 
 	/**
 	 * Iterable ensemble of all valid Windows
-	 * @tparam Tfront Wether we iterate from front
+	 * @tparam Tfront Whether we iterate from front
 	 */
 	template <bool Tfront>
 	struct AllWindows {