Codefix: typos in comments and strings

src/aircraft_cmd.cpp

@@ -1674,7 +1674,7 @@ static void AircraftEventHandler_Flying(Aircraft *v, const AirportFTAClass *apc)
 			if (current->heading == landingtype) {
 				/* save speed before, since if AirportHasBlock is false, it resets them to 0
 				 * we don't want that for plane in air
-				 * hack for speed thingie */
+				 * hack for speed thingy */
 				uint16_t tcur_speed = v->cur_speed;
 				uint16_t tsubspeed = v->subspeed;
 				if (!AirportHasBlock(v, current, apc)) {

src/autoreplace_cmd.cpp

@@ -435,7 +435,7 @@ static CommandCost CopyHeadSpecificThings(Vehicle *old_head, Vehicle *new_head,
 
 	/* Last do those things which do never fail (resp. we do not care about), but which are not undo-able */
 	if (cost.Succeeded() && old_head != new_head && flags.Test(DoCommandFlag::Execute)) {
-		/* Copy other things which cannot be copied by a command and which shall not stay resetted from the build vehicle command */
+		/* Copy other things which cannot be copied by a command and which shall not stay reset from the build vehicle command */
 		new_head->CopyVehicleConfigAndStatistics(old_head);
 		GroupStatistics::AddProfitLastYear(new_head);
 

src/autoreplace_gui.cpp

@@ -562,8 +562,8 @@ public:
 					this->HandleButtonClick(WID_RV_START_REPLACE);
 					ReplaceClick_StartReplace(false);
 				} else {
-					bool replacment_when_old = EngineHasReplacementWhenOldForCompany(Company::Get(_local_company), this->sel_engine[0], this->sel_group);
-					ShowDropDownMenu(this, _start_replace_dropdown, replacment_when_old ? 1 : 0, WID_RV_START_REPLACE, !this->replace_engines ? 1 << 1 : 0, 0);
+					bool replacement_when_old = EngineHasReplacementWhenOldForCompany(Company::Get(_local_company), this->sel_engine[0], this->sel_group);
+					ShowDropDownMenu(this, _start_replace_dropdown, replacement_when_old ? 1 : 0, WID_RV_START_REPLACE, !this->replace_engines ? 1 << 1 : 0, 0);
 				}
 				break;
 			}

src/base_station_base.h

@@ -243,7 +243,7 @@ struct SpecializedStation : public BaseStation {
 
 	/**
 	 * Gets station with given index
-	 * @return pointer to station with given index casted to T *
+	 * @return pointer to station with given index cast to T *
 	 */
 	static inline T *Get(auto index)
 	{

src/cargopacket.h

@@ -571,7 +571,7 @@ public:
 	}
 
 	/**
-	 * Returns sum of cargo still available for loading at the sation.
+	 * Returns sum of cargo still available for loading at the station.
 	 * (i.e. not counting cargo which is already reserved for loading)
 	 * @return Cargo on board the vehicle.
 	 */

src/command_type.h

@@ -24,7 +24,7 @@ struct GRFFile;
 class CommandCost {
 	Money cost;                                 ///< The cost of this action
 	StringID message;                           ///< Warning message for when success is unset
-	ExpensesType expense_type;                  ///< the type of expence as shown on the finances view
+	ExpensesType expense_type;                  ///< the type of expense as shown on the finances view
 	bool success;                               ///< Whether the command went fine up to this moment
 	Owner owner = CompanyID::Invalid(); ///< Originator owner of error.
 	StringID extra_message = INVALID_STRING_ID; ///< Additional warning message for when success is unset

src/company_cmd.cpp

@@ -196,7 +196,7 @@ static bool IsValidCompanyManagerFace(CompanyManagerFace cmf)
 	return true;
 }
 
-static CompanyMask _dirty_company_finances{}; ///< Bitmask of compamy finances that should be marked dirty.
+static CompanyMask _dirty_company_finances{}; ///< Bitmask of company finances that should be marked dirty.
 
 /**
  * Mark all finance windows owned by a company as needing a refresh.
@@ -1512,7 +1512,7 @@ std::optional<CompanyManagerFace> ParseCompanyManagerFaceCode(std::string_view s
 		auto bits = consumer.TryReadIntegerBase<uint32_t>(10, true);
 		if (!bits.has_value() || consumer.AnyBytesLeft()) return std::nullopt;
 
-		/* Ensure style laberl is valid. */
+		/* Ensure style label is valid. */
 		auto style = FindCompanyManagerFaceLabel(label);
 		if (!style.has_value()) return std::nullopt;
 

src/core/string_consumer.hpp

@@ -74,7 +74,7 @@ public:
 	[[nodiscard]] size_type GetBytesLeft() const noexcept { return this->src.size() - this->position; }
 
 	/**
-	 * Check wheter any bytes were already read.
+	 * Check whether any bytes were already read.
 	 */
 	[[nodiscard]] bool AnyBytesRead() const noexcept { return this->position > 0; }
 	/**
@@ -543,12 +543,12 @@ public:
 	void Skip(size_type len);
 
 	/**
-	 * Find first occurence of 'str'.
+	 * Find first occurrence of 'str'.
 	 * @return Offset from current reader position. 'npos' if no match found.
 	 */
 	[[nodiscard]] size_type Find(std::string_view str) const;
 	/**
-	 * Find first occurence of 8-bit char 'c'.
+	 * Find first occurrence of 8-bit char 'c'.
 	 * @return Offset from current reader position. 'npos' if no match found.
 	 */
 	[[nodiscard]] size_type FindChar(char c) const
@@ -556,18 +556,18 @@ public:
 		return this->Find({&c, 1});
 	}
 	/**
-	 * Find first occurence of UTF-8 char 'c'.
+	 * Find first occurrence of UTF-8 char 'c'.
 	 * @return Offset from current reader position. 'npos' if no match found.
 	 */
 	[[nodiscard]] size_type FindUtf8(char32_t c) const;
 
 	/**
-	 * Find first occurence of any 8-bit char in 'chars'.
+	 * Find first occurrence of any 8-bit char in 'chars'.
 	 * @return Offset from current reader position. 'npos' if no match found.
 	 */
 	[[nodiscard]] size_type FindCharIn(std::string_view chars) const;
 	/**
-	 * Find first occurence of any 8-bit char not in 'chars'.
+	 * Find first occurrence of any 8-bit char not in 'chars'.
 	 * @return Offset from current reader position. 'npos' if no match found.
 	 */
 	[[nodiscard]] size_type FindCharNotIn(std::string_view chars) const;

src/currency.h

@@ -44,7 +44,7 @@ enum Currencies : uint8_t {
 	CURRENCY_NLG,       ///< Dutch Gulden
 	CURRENCY_NOK,       ///< Norwegian Krone
 	CURRENCY_PLN,       ///< Polish Zloty
-	CURRENCY_RON,       ///< Romenian Leu
+	CURRENCY_RON,       ///< Romanian Leu
 	CURRENCY_RUR,       ///< Russian Rouble
 	CURRENCY_SIT,       ///< Slovenian Tolar
 	CURRENCY_SEK,       ///< Swedish Krona

src/effectvehicle_func.h

@@ -17,7 +17,7 @@ enum EffectVehicleType : uint8_t {
 	EV_CHIMNEY_SMOKE            =  0, ///< Smoke of power plant (industry).
 	EV_STEAM_SMOKE              =  1, ///< Smoke of steam engines.
 	EV_DIESEL_SMOKE             =  2, ///< Smoke of diesel engines.
-	EV_ELECTRIC_SPARK           =  3, ///< Sparcs of electric engines.
+	EV_ELECTRIC_SPARK           =  3, ///< Sparks of electric engines.
 	EV_CRASH_SMOKE              =  4, ///< Smoke of disasters.
 	EV_EXPLOSION_LARGE          =  5, ///< Various explosions.
 	EV_BREAKDOWN_SMOKE          =  6, ///< Smoke of broken vehicles except aircraft.

src/engine.cpp

@@ -524,7 +524,7 @@ void EngineOverrideManager::ResetToDefaultMapping()
  * @param grf_local_id The local id in the newgrf
  * @param grfid The GrfID that defines the scope of grf_local_id.
  *              If a newgrf overrides the engines of another newgrf, the "scope grfid" is the ID of the overridden newgrf.
- *              If dynnamic_engines is disabled, all newgrf share the same ID scope identified by INVALID_GRFID.
+ *              If dynamic_engines is disabled, all newgrf share the same ID scope identified by INVALID_GRFID.
  * @return The engine ID if present, or EngineID::Invalid() if not.
  */
 EngineID EngineOverrideManager::GetID(VehicleType type, uint16_t grf_local_id, uint32_t grfid)
@@ -542,7 +542,7 @@ EngineID EngineOverrideManager::GetID(VehicleType type, uint16_t grf_local_id, u
  * @param grf_local_id The local id in the newgrf
  * @param grfid The GrfID that defines the scope of grf_local_id.
  *              If a newgrf overrides the engines of another newgrf, the "scope grfid" is the ID of the overridden newgrf.
- *              If dynnamic_engines is disabled, all newgrf share the same ID scope identified by INVALID_GRFID.
+ *              If dynamic_engines is disabled, all newgrf share the same ID scope identified by INVALID_GRFID.
  * @param static_access Whether to actually reserve the EngineID.
  * @return The engine ID if present and now reserved, or EngineID::Invalid() if not.
  */

src/engine_base.h

@@ -212,7 +212,7 @@ struct EngineIDMappingKeyProjection {
 
 /**
  * Stores the mapping of EngineID to the internal id of newgrfs.
- * Note: This is not part of Engine, as the data in the EngineOverrideManager and the engine pool get resetted in different cases.
+ * Note: This is not part of Engine, as the data in the EngineOverrideManager and the engine pool get reset in different cases.
  */
 struct EngineOverrideManager {
 	std::array<std::vector<EngineIDMapping>, VEH_COMPANY_END> mappings;

src/genworld.cpp

@@ -455,7 +455,7 @@ void LoadTownData()
 			default: NOT_REACHED();
 		}
 
-		TownID town_id; // The TownID of the town in OpenTTD. Not imported, but set during the founding proceess and stored here for convenience.
+		TownID town_id; // The TownID of the town in OpenTTD. Not imported, but set during the founding process and stored here for convenience.
 		/* Try founding on the target tile, and if that doesn't work, find the nearest suitable tile up to 16 tiles away.
 		 * The target might be on water, blocked somehow, or on a steep slope that can't be terraformed by the founding command. */
 		for (auto tile : SpiralTileSequence(target_tile, 16, 0, 0)) {

src/gfx.cpp

@@ -850,7 +850,7 @@ int DrawStringMultiLine(int left, int right, int top, int bottom, StringID str,
 /**
  * Draw a multiline string, possibly over multiple lines, if the region is within the current display clipping area.
  * @note With clipping, it is not possible to determine how tall the rendered text will be, as it's not layouted.
- *       Regulard DrawStringMultiLine must be used if the height needs to be known.
+ *       Regular DrawStringMultiLine must be used if the height needs to be known.
  *
  * @param left   The left most position to draw on.
  * @param right  The right most position to draw on.

src/graph_gui.cpp

@@ -1602,7 +1602,7 @@ struct PerformanceRatingDetailWindow : Window {
 		/* Draw it */
 		DrawString(this->bar_left, this->bar_right, text_top, GetString(STR_PERFORMANCE_DETAIL_PERCENT, Clamp<int64_t>(val, 0, needed) * 100 / needed), TC_FROMSTRING, SA_HOR_CENTER);
 
-		/* SCORE_LOAN is inversed */
+		/* SCORE_LOAN is inverted */
 		if (score_type == SCORE_LOAN) val = needed - val;
 
 		/* Draw the amount we have against what is needed

src/group_cmd.cpp

@@ -96,7 +96,7 @@ uint16_t GroupStatistics::GetNumEngines(EngineID engine) const
 }
 
 /**
- * Returns the GroupStatistic for the ALL_GROUPO of a vehicle type.
+ * Returns the GroupStatistic for the ALL_GROUP of a vehicle type.
  * @param v Vehicle.
  * @return GroupStatistics for the ALL_GROUP of the vehicle type.
  */

src/highscore.h

@@ -15,7 +15,7 @@
 #include "settings_type.h"
 
 struct HighScore {
-	std::string name; ///< The name of the companyy and president.
+	std::string name; ///< The name of the company and president.
 	StringID title = INVALID_STRING_ID; ///< NOSAVE, has troubles with changing string-numbers.
 	uint16_t score = 0; ///< The score for this high score. Do NOT change type, will break hs.dat
 };

src/industry_cmd.cpp

@@ -701,7 +701,7 @@ static void AnimateTile_Industry(TileIndex tile)
 		if ((TimerGameTick::counter & 1) == 0) AnimateSugarSieve(tile);
 		break;
 
-	case GFX_TOFFEE_QUARY:
+	case GFX_TOFFEE_QUARRY:
 		if ((TimerGameTick::counter & 3) == 0) AnimateToffeeQuarry(tile);
 		break;
 
@@ -793,7 +793,7 @@ static void MakeIndustryTileBigger(TileIndex tile)
 
 	case GFX_TOY_FACTORY:
 	case GFX_BUBBLE_CATCHER:
-	case GFX_TOFFEE_QUARY:
+	case GFX_TOFFEE_QUARRY:
 		SetAnimationFrame(tile, 0);
 		SetIndustryAnimationLoop(tile, 0);
 		break;
@@ -938,7 +938,7 @@ static void TileLoop_Industry(TileIndex tile)
 		TileLoopIndustry_BubbleGenerator(tile);
 		break;
 
-	case GFX_TOFFEE_QUARY:
+	case GFX_TOFFEE_QUARRY:
 		AddAnimatedTile(tile);
 		break;
 

src/industry_map.h

@@ -49,7 +49,7 @@ enum IndustryGraphics : uint8_t {
 	GFX_PLASTIC_FOUNTAIN_ANIMATED_8    = 155,
 	GFX_BUBBLE_GENERATOR               = 161,
 	GFX_BUBBLE_CATCHER                 = 162,
-	GFX_TOFFEE_QUARY                   = 165,
+	GFX_TOFFEE_QUARRY                  = 165,
 	GFX_SUGAR_MINE_SIEVE               = 174,
 	GFX_WATERTILE_SPECIALCHECK         = 255,  ///< not really a tile, but rather a very special check
 };

src/linkgraph/linkgraphjob.cpp

@@ -28,7 +28,7 @@ INSTANTIATE_POOL_METHODS(LinkGraphJob)
 
 /**
  * Create a link graph job from a link graph. The link graph will be copied so
- * that the calculations don't interfer with the normal operations on the
+ * that the calculations don't interfere with the normal operations on the
  * original. The job is immediately started.
  * @param orig Original LinkGraph to be copied.
  */

src/main_gui.cpp

@@ -201,7 +201,7 @@ enum GlobalHotKeys : int32_t {
 	GHK_TOGGLE_TRANSPARENCY,
 	GHK_TOGGLE_INVISIBILITY = GHK_TOGGLE_TRANSPARENCY + 9,
 	GHK_TRANSPARENCY_TOOLBAR = GHK_TOGGLE_INVISIBILITY + 8,
-	GHK_TRANSPARANCY,
+	GHK_TRANSPARENCY,
 	GHK_CHAT,
 	GHK_CHAT_ALL,
 	GHK_CHAT_COMPANY,
@@ -382,7 +382,7 @@ struct MainWindow : Window
 				ShowTransparencyToolbar();
 				break;
 
-			case GHK_TRANSPARANCY:
+			case GHK_TRANSPARENCY:
 				ResetRestoreAllTransparency();
 				break;
 
@@ -515,7 +515,7 @@ struct MainWindow : Window
 		Hotkey('7' | WKC_CTRL | WKC_SHIFT, "invisibility_structures", GHK_TOGGLE_INVISIBILITY + 6),
 		Hotkey('8' | WKC_CTRL | WKC_SHIFT, "invisibility_catenary", GHK_TOGGLE_INVISIBILITY + 7),
 		Hotkey('X' | WKC_CTRL, "transparency_toolbar", GHK_TRANSPARENCY_TOOLBAR),
-		Hotkey('X', "toggle_transparency", GHK_TRANSPARANCY),
+		Hotkey('X', "toggle_transparency", GHK_TRANSPARENCY),
 		Hotkey({WKC_RETURN, 'T'}, "chat", GHK_CHAT),
 		Hotkey({WKC_SHIFT | WKC_RETURN, WKC_SHIFT | 'T'}, "chat_all", GHK_CHAT_ALL),
 		Hotkey({WKC_CTRL | WKC_RETURN, WKC_CTRL | 'T'}, "chat_company", GHK_CHAT_COMPANY),

src/music/midi.h

@@ -10,7 +10,7 @@
 #ifndef MUSIC_MIDI_H
 #define MUSIC_MIDI_H
 
-/** Header of a Stanard MIDI File */
+/** Header of a Standard MIDI File */
 struct SMFHeader {
 	uint16_t format;
 	uint16_t tracks;
@@ -73,7 +73,7 @@ enum MidiController : uint8_t {
 	MIDICT_GENERAL4          =  19,
 	/* Offset from MSB to LSB of continuous controllers */
 	MIDICTOFS_HIGHRES        =  32,
-	/* Stanard continuous controllers (LSB control) */
+	/* Standard continuous controllers (LSB control) */
 	MIDICT_BANKSELECT_LO     = MIDICTOFS_HIGHRES + MIDICT_BANKSELECT,
 	MIDICT_MODWHEEL_LO       = MIDICTOFS_HIGHRES + MIDICT_MODWHEEL,
 	MIDICT_BREATH_LO         = MIDICTOFS_HIGHRES + MIDICT_BREATH,

src/network/core/address.cpp

@@ -262,7 +262,7 @@ SOCKET NetworkAddress::Resolve(int family, int socktype, int flags, SocketList *
 			std::copy_n(reinterpret_cast<const std::byte *>(runp->ai_addr), runp->ai_addrlen, reinterpret_cast<std::byte *>(&this->address));
 #ifdef __EMSCRIPTEN__
 			/* Emscripten doesn't zero sin_zero, but as we compare addresses
-			 * to see if they are the same address, we need them to be zero'd.
+			 * to see if they are the same address, we need them to be zeroed.
 			 * Emscripten is, as far as we know, the only OS not doing this.
 			 *
 			 * https://github.com/emscripten-core/emscripten/issues/12998

src/network/core/http_winhttp.cpp

@@ -159,7 +159,7 @@ void NetworkHTTPRequest::WinHttpCallback(DWORD code, void *info, DWORD length)
 			DWORD size = *(DWORD *)info;
 
 			/* Next step: read the data in a temporary allocated buffer.
-			 * The buffer will be free'd by OnReceiveData() in the next step. */
+			 * The buffer will be freed by OnReceiveData() in the next step. */
 			char *buffer = size == 0 ? nullptr : new char[size];
 			WinHttpReadData(this->request, buffer, size, 0);
 		} break;
@@ -278,7 +278,7 @@ bool NetworkHTTPRequest::Receive()
 /**
  * Destructor of the HTTP request.
  *
- * Makes sure all handlers are closed, and all memory is free'd.
+ * Makes sure all handlers are closed, and all memory is freed.
  */
 NetworkHTTPRequest::~NetworkHTTPRequest()
 {

src/network/core/network_game_info.cpp

@@ -42,7 +42,7 @@ NetworkServerGameInfo _network_game_info; ///< Information about our game.
 
 /**
  * Get the network version string used by this build.
- * The returned string is guaranteed to be at most NETWORK_REVISON_LENGTH bytes including '\0' terminator.
+ * The returned string is guaranteed to be at most NETWORK_REVISION_LENGTH bytes including '\0' terminator.
  */
 std::string_view GetNetworkRevisionString()
 {

src/network/network_admin.cpp

@@ -109,7 +109,7 @@ ServerNetworkAdminSocketHandler::~ServerNetworkAdminSocketHandler()
 }
 
 /**
- * Handle the acception of a connection.
+ * Handle the acceptance of a connection.
  * @param s The socket of the new connection.
  * @param address The address of the peer.
  */

src/network/network_client.cpp

@@ -1117,7 +1117,7 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_MOVE(Packet &p)
 	ClientID client_id   = (ClientID)p.Recv_uint32();
 	CompanyID company_id = (CompanyID)p.Recv_uint8();
 
-	Debug(net, 9, "Client::Receive_SERVER_MOVE(): client_id={}, comapny_id={}", client_id, company_id);
+	Debug(net, 9, "Client::Receive_SERVER_MOVE(): client_id={}, company_id={}", client_id, company_id);
 
 	if (client_id == 0) {
 		/* definitely an invalid client id, debug message and do nothing. */

src/network/network_coordinator.cpp

@@ -656,7 +656,7 @@ void ClientNetworkCoordinatorSocketHandler::CloseTurnHandler(std::string_view to
 	turn_it->second->CloseSocket();
 
 	/* We don't remove turn_handler here, as we can be called from within that
-	 * turn_handler instance, so our object cannot be free'd yet. Instead, we
+	 * turn_handler instance, so our object cannot be freed yet. Instead, we
 	 * check later if the connection is closed, and free the object then. */
 }
 

src/network/network_crypto.cpp

@@ -92,7 +92,7 @@ bool X25519DerivedKeys::Exchange(const X25519PublicKey &peer_public_key, X25519K
 }
 
 /**
- * Encryption handler implementation for monocypther encryption after a X25519 key exchange.
+ * Encryption handler implementation for monocypher encryption after a X25519 key exchange.
  */
 class X25519EncryptionHandler : public NetworkEncryptionHandler {
 private:

src/network/network_gui.cpp

@@ -1428,7 +1428,7 @@ private:
 	}
 
 	/**
-	 * Crete new company button is clicked.
+	 * Create new company button is clicked.
 	 * @param w The instance of this window.
 	 * @param pt The point where this button was clicked.
 	 */
@@ -1621,7 +1621,7 @@ public:
 	{
 		this->RebuildList();
 
-		/* Currently server information is not sync'd to clients, so we cannot show it on clients. */
+		/* Currently server information is not synced to clients, so we cannot show it on clients. */
 		this->GetWidget<NWidgetStacked>(WID_CL_SERVER_SELECTOR)->SetDisplayedPlane(_network_server ? 0 : SZSP_HORIZONTAL);
 		this->SetWidgetDisabledState(WID_CL_SERVER_NAME_EDIT, !_network_server);
 	}
@@ -2065,7 +2065,7 @@ struct NetworkJoinStatusWindow : Window {
 						}
 						[[fallthrough]];
 
-					default: // Waiting is 15%, so the resting receivement of map is maximum 70%
+					default: // Waiting is 15%, so the remaining downloading of the map is maximum 70%
 						progress = 15 + _network_join_bytes * (100 - 15) / _network_join_bytes_total;
 						break;
 				}

src/newgrf.cpp

@@ -1444,7 +1444,7 @@ static void ActivateOldShore()
 }
 
 /**
- * Replocate the old tram depot sprites to the new position, if no new ones were loaded.
+ * Relocate the old tram depot sprites to the new position, if no new ones were loaded.
  */
 static void ActivateOldTramDepot()
 {

src/newgrf/newgrf_act0_cargo.cpp

@@ -142,7 +142,7 @@ static ChangeInfoResult CargoReserveInfo(uint first, uint last, int prop, ByteRe
 				cs->callback_mask = static_cast<CargoCallbackMasks>(buf.ReadByte());
 				break;
 
-			case 0x1D: // Vehicle capacity muliplier
+			case 0x1D: // Vehicle capacity multiplier
 				cs->multiplier = std::max<uint16_t>(1u, buf.ReadWord());
 				break;
 

src/newgrf/newgrf_act0_globalvar.cpp

@@ -472,7 +472,7 @@ bool GetGlobalVariable(uint8_t param, uint32_t *value, const GRFFile *grffile)
 				/* skip elrail multiplier - disabled */
 				SB(*value, 8, 8, GetRailTypeInfo(RAILTYPE_MONO)->cost_multiplier); // monorail
 			} else {
-				SB(*value, 8, 8, GetRailTypeInfo(RAILTYPE_ELECTRIC)->cost_multiplier); // electified railway
+				SB(*value, 8, 8, GetRailTypeInfo(RAILTYPE_ELECTRIC)->cost_multiplier); // electrified railway
 				/* Skip monorail multiplier - no space in result */
 			}
 			SB(*value, 16, 8, GetRailTypeInfo(RAILTYPE_MAGLEV)->cost_multiplier); // maglev

src/newgrf/newgrf_act0_industries.cpp

@@ -418,7 +418,7 @@ static ChangeInfoResult IndustriesChangeInfo(uint first, uint last, int prop, By
 
 						IndustryTileLayoutTile &it = layout.emplace_back();
 
-						it.ti.x = buf.ReadByte(); // Offsets from northermost tile
+						it.ti.x = buf.ReadByte(); // Offsets from northernmost tile
 						++bytes_read;
 
 						if (it.ti.x == 0xFE && k == 0) {

src/newgrf/newgrf_act7_9.cpp

@@ -44,7 +44,7 @@ void InitializePatchFlags()
 	                   |                                                       (1U << 0x09)  // trainrefit
 	                   |                                                       (0U << 0x0B)  // subsidiaries
 	                   |         ((_settings_game.order.gradual_loading ? 1U : 0U) << 0x0C)  // gradualloading
-	                   |                                                       (1U << 0x12)  // unifiedmaglevmode - set bit 0 mode. Not revelant to OTTD
+	                   |                                                       (1U << 0x12)  // unifiedmaglevmode - set bit 0 mode. Not relevant to OTTD
 	                   |                                                       (1U << 0x13)  // unifiedmaglevmode - set bit 1 mode
 	                   |                                                       (1U << 0x14)  // bridgespeedlimits
 	                   |                                                       (1U << 0x16)  // eternalgame
@@ -55,7 +55,7 @@ void InitializePatchFlags()
 	                   | ((_settings_game.construction.train_signal_side == 1 ? 1U : 0U) << 0x1B)  // signalsontrafficside
 	                   |       ((_settings_game.vehicle.disable_elrails ? 0U : 1U) << 0x1C); // electrifiedrailway
 
-	_ttdpatch_flags[2] =                                                       (1U << 0x01)  // loadallgraphics - obsolote
+	_ttdpatch_flags[2] =                                                       (1U << 0x01)  // loadallgraphics - obsolete
 	                   |                                                       (1U << 0x03)  // semaphores
 	                   |                                                       (1U << 0x0A)  // newobjects
 	                   |                                                       (0U << 0x0B)  // enhancedgui

src/newgrf_act5.h

@@ -15,7 +15,7 @@
 /** The type of action 5 type. */
 enum Action5BlockType : uint8_t {
 	A5BLOCK_FIXED,                ///< Only allow replacing a whole block of sprites. (TTDP compatible)
-	A5BLOCK_ALLOW_OFFSET,         ///< Allow replacing any subset by specifiing an offset.
+	A5BLOCK_ALLOW_OFFSET,         ///< Allow replacing any subset by specifying an offset.
 	A5BLOCK_INVALID,              ///< unknown/not-implemented type
 };
 

src/newgrf_badge_gui.cpp

@@ -363,7 +363,7 @@ DropDownList BuildBadgeClassConfigurationList(const GUIBadgeClasses &gui_classes
  * Toggle badge class visibility.
  * @param feature Feature being used.
  * @param class_badge Class badge.
- * @param click Dropdown click reuslt.
+ * @param click Dropdown click result.
  */
 static void BadgeClassToggleVisibility(GrfSpecFeature feature, Badge &class_badge, int click_result, BadgeFilterChoices &choices)
 {
@@ -570,7 +570,7 @@ void ResetBadgeFilter(BadgeFilterChoices &choices, BadgeClassID badge_class_inde
 
 /**
  * Set badge filter choice for a class.
- * @param choides Badge filter choides.
+ * @param choices Badge filter choices.
  * @param badge_index Badge to set. The badge class is inferred from the badge.
  * @note if the badge_index is invalid, the filter will be reset instead.
  */

src/newgrf_commons.h

@@ -6,7 +6,7 @@
  */
 
 /**
- * @file newgrf_commons.h This file simplyfies and embeds a common mechanism of
+ * @file newgrf_commons.h This file simplifies and embeds a common mechanism of
  * loading/saving and mapping of grf entities.
  */
 

src/newgrf_engine.cpp

@@ -246,7 +246,7 @@ enum TTDPAircraftMovementActions : uint8_t {
 	AMA_TTDP_PAD1_TO_TAKEOFF,
 	AMA_TTDP_PAD2_TO_TAKEOFF,
 	AMA_TTDP_PAD3_TO_TAKEOFF,
-	AMA_TTDP_HANGAR_TO_TAKOFF,
+	AMA_TTDP_HANGAR_TO_TAKEOFF,
 	AMA_TTDP_LANDING_TO_HANGAR,
 	AMA_TTDP_IN_FLIGHT,
 };
@@ -1243,7 +1243,7 @@ int GetEngineProperty(EngineID engine, PropertyID property, int orig_value, cons
 }
 
 /**
- * Test for vehicle build probablity type.
+ * Test for vehicle build probability type.
  * @param v Vehicle whose build probability to test.
  * @param type Build probability type to test for.
  * @returns True or false depending on the probability result, or std::nullopt if the callback failed.

src/order_gui.cpp

@@ -1771,7 +1771,7 @@ void ShowOrdersWindow(const Vehicle *v)
 	/* Using a different WindowDescs for _local_company causes problems.
 	 * Due to this we have to close order windows in ChangeWindowOwner/CloseCompanyWindows,
 	 * because we cannot change switch the WindowDescs and keeping the old WindowDesc results
-	 * in crashed due to missing widges.
+	 * in crashed due to missing widget.
 	 * TODO Rewrite the order GUI to not use different WindowDescs.
 	 */
 	if (v->owner != _local_company) {

src/os/macosx/string_osx.cpp

@@ -170,8 +170,8 @@ static const CTRunDelegateCallbacks _sprite_font_callback = {
 	CFAutoRelease<CFStringRef> base(CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, buff, length, kCFAllocatorNull));
 	CFAttributedStringReplaceString(str.get(), CFRangeMake(0, 0), base.get());
 
-	const UniChar replacment_char = 0xFFFC;
-	CFAutoRelease<CFStringRef> replacment_str(CFStringCreateWithCharacters(kCFAllocatorDefault, &replacment_char, 1));
+	const UniChar replacement_char = 0xFFFC;
+	CFAutoRelease<CFStringRef> replacement_str(CFStringCreateWithCharacters(kCFAllocatorDefault, &replacement_char, 1));
 
 	/* Apply font and colour ranges to our string. This is important to make sure
 	 * that we get proper glyph boundaries on style changes. */
@@ -199,7 +199,7 @@ static const CTRunDelegateCallbacks _sprite_font_callback = {
 			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 official documentation, if a run delegate is used, the char should always be 0xFFFC. */
-				CFAttributedStringReplaceString(str.get(), CFRangeMake(c, 1), replacment_str.get());
+				CFAttributedStringReplaceString(str.get(), CFRangeMake(c, 1), replacement_str.get());
 				CFAttributedStringSetAttribute(str.get(), CFRangeMake(c, 1), kCTRunDelegateAttributeName, del.get());
 			}
 		}
@@ -253,7 +253,7 @@ CoreTextParagraphLayout::CoreTextVisualRun::CoreTextVisualRun(CTRunRef run, Font
 	CTRunGetGlyphs(run, CFRangeMake(0, 0), gl.get());
 	for (size_t i = 0; i < this->glyphs.size(); i++) {
 		if (buff[this->glyph_to_char[i]] >= SCC_SPRITE_START && buff[this->glyph_to_char[i]] <= SCC_SPRITE_END && (gl[i] == 0 || gl[i] == 3)) {
-			/* A glyph of 0 indidicates not found, while apparently 3 is what char 0xFFFC maps to. */
+			/* A glyph of 0 indicates not found, while apparently 3 is what char 0xFFFC maps to. */
 			this->glyphs[i] = font->fc->MapCharToGlyph(buff[this->glyph_to_char[i]]);
 			this->positions.emplace_back(pts[i].x, pts[i].x + advs[i].width - 1, (font->fc->GetHeight() - ScaleSpriteTrad(FontCache::GetDefaultFontHeight(font->fc->GetSize()))) / 2); // Align sprite font to centre
 		} else {

src/palette.cpp

@@ -29,7 +29,7 @@ static std::recursive_mutex _palette_mutex; ///< To coordinate access to _cur_pa
  * PALETTE_BITS reduces the bits-per-channel of 32bpp graphics data to allow faster palette lookups from
  * a smaller lookup table.
  *
- * 6 bpc is chosen as this results in a palette lookup table of 256KiB with adequate fidelty.
+ * 6 bpc is chosen as this results in a palette lookup table of 256KiB with adequate fidelity.
  * 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

src/pathfinder/yapf/yapf_road.cpp

@@ -404,7 +404,7 @@ public:
 					TileArea non_cached_area = v->IsBus() ? st->bus_station : st->truck_station;
 					non_cached_area.Expand(YAPF_ROADVEH_PATH_CACHE_DESTINATION_LIMIT);
 
-					/* Find the first tile not contained by the non-cachable area, and remove from the cache. */
+					/* Find the first tile not contained by the non-cacheable area, and remove from the cache. */
 					auto it = std::find_if(std::begin(path_cache), std::end(path_cache), [&non_cached_area](const auto &pc) { return !non_cached_area.Contains(pc.tile); });
 					path_cache.erase(std::begin(path_cache), it);
 				}

src/picker_gui.h

@@ -178,7 +178,7 @@ public:
 	static constexpr int PREVIEW_LEFT = 31; ///< Offset from left edge to draw preview.
 	static constexpr int PREVIEW_BOTTOM = 31; ///< Offset from bottom edge to draw preview.
 
-	static constexpr int STEP_PREVIEW_HEIGHT = 16; ///< Step for decreasing or increase preivew button height.
+	static constexpr int STEP_PREVIEW_HEIGHT = 16; ///< Step for decreasing or increase preview button height.
 	static constexpr int MAX_PREVIEW_HEIGHT = PREVIEW_HEIGHT * 3; ///< Maximum height of each preview button.
 
 	static constexpr uint EDITBOX_MAX_SIZE = 16; ///< The maximum number of characters for the filter edit box.

src/random_access_file_type.h

@@ -24,7 +24,7 @@ class RandomAccessFile {
 	static constexpr int BUFFER_SIZE = 512;
 
 	std::string filename;            ///< Full name of the file; relative path to subdir plus the extension of the file.
-	std::string simplified_filename; ///< Simplified lowecase name of the file; only the name, no path or extension.
+	std::string simplified_filename; ///< Simplified lowercase name of the file; only the name, no path or extension.
 
 	std::optional<FileHandle> file_handle; ///< File handle of the open file.
 	size_t pos;                      ///< Position in the file of the end of the read buffer.

src/road_cmd.cpp

@@ -794,7 +794,7 @@ CommandCost CmdBuildRoad(DoCommandFlags flags, TileIndex tile, RoadBits pieces,
 
 		case MP_TUNNELBRIDGE: {
 			if (GetTunnelBridgeTransportType(tile) != TRANSPORT_ROAD) goto do_clear;
-			/* Only allow building the outern roadbit, so building long roads stops at existing bridges */
+			/* Only allow building the outer roadbit, so building long roads stops at existing bridges */
 			if (MirrorRoadBits(DiagDirToRoadBits(GetTunnelBridgeDirection(tile))) != pieces) goto do_clear;
 			if (HasTileRoadType(tile, rtt)) return CommandCost(STR_ERROR_ALREADY_BUILT);
 			/* Don't allow adding roadtype to the bridge/tunnel when vehicles are already driving on it */

src/roadveh_cmd.cpp

@@ -1712,7 +1712,7 @@ static void CheckIfRoadVehNeedsService(RoadVehicle *v)
 	SetWindowWidgetDirty(WC_VEHICLE_VIEW, v->index, WID_VV_START_STOP);
 }
 
-/** Calandar day handler */
+/** Calander day handler */
 void RoadVehicle::OnNewCalendarDay()
 {
 	if (!this->IsFrontEngine()) return;

src/saveload/afterload.cpp

@@ -3035,7 +3035,7 @@ bool AfterLoadGame()
 		/* Fix articulated road vehicles.
 		 * Some curves were shorter than other curves.
 		 * Now they have the same length, but that means that trailing articulated parts will
-		 * take longer to go through the curve than the parts in front which already left the courve.
+		 * take longer to go through the curve than the parts in front which already left the curve.
 		 * So, make articulated parts catch up. */
 		bool roadside = _settings_game.vehicle.road_side == 1;
 		std::vector<uint> skip_frames;

src/saveload/oldloader_sl.cpp

@@ -932,7 +932,7 @@ static bool LoadOldCompanyEconomy(LoadgameState &ls, int)
 
 	if (!LoadChunk(ls, &c->cur_economy, _company_economy_chunk)) return false;
 
-	/* Don't ask, but the number in TTD(Patch) are inversed to OpenTTD */
+	/* Don't ask, but the number in TTD(Patch) are inverted to OpenTTD */
 	c->cur_economy.income   = -c->cur_economy.income;
 	c->cur_economy.expenses = -c->cur_economy.expenses;
 

src/screenshot.cpp

@@ -285,7 +285,7 @@ static bool MakeLargeWorldScreenshot(ScreenshotType t, uint32_t width = 0, uint3
 }
 
 /**
- * Callback for generating a heightmap. Supports 8bpp grayscale only.
+ * Callback for generating a heightmap. Supports 8bpp greyscale only.
  * @param buffer   Destination buffer.
  * @param y        Line number of the first line to write.
  * @param n        Number of lines to write.

src/script/api/script_object.cpp

@@ -354,7 +354,7 @@ ScriptObject::DisableDoCommandScope::DisableDoCommandScope()
 
 /* static */ SQInteger ScriptObject::Constructor(HSQUIRRELVM)
 {
-	throw Script_FatalError("This class is not instantiable");
+	throw Script_FatalError("This class is not instantiatable");
 }
 
 /* static */ SQInteger ScriptObject::_cloned(HSQUIRRELVM vm)

src/script/api/script_object.hpp

@@ -55,7 +55,7 @@ private:
 };
 
 /**
- * Uper-parent object of all API classes. You should never use this class in
+ * Upper-parent object of all API classes. You should never use this class in
  *   your script, as it doesn't publish any public functions. It is used
  *   internally to have a common place to handle general things, like internal
  *   command processing, and command-validation checks.
@@ -143,7 +143,7 @@ public:
 	static void InitializeRandomizers();
 
 	/**
-	 * Used when trying to instanciate ScriptObject from squirrel.
+	 * Used when trying to instantiate ScriptObject from squirrel.
 	 */
 	static SQInteger Constructor(HSQUIRRELVM);
 

src/script/api/script_order.hpp

@@ -93,7 +93,7 @@ public:
 		OC_RELIABILITY         = ::OCV_RELIABILITY,        ///< Skip based on the reliability, value is percent (0..100).
 		OC_MAX_RELIABILITY     = ::OCV_MAX_RELIABILITY,    ///< Skip based on the maximum reliability.  Value in percent
 		OC_MAX_SPEED           = ::OCV_MAX_SPEED,          ///< Skip based on the maximum speed, value is in OpenTTD's internal speed unit, see ScriptEngine::GetMaxSpeed.
-		OC_AGE                 = ::OCV_AGE,                ///< Skip based on the age, value is in calender-years. @see \ref ScriptCalendarTime
+		OC_AGE                 = ::OCV_AGE,                ///< Skip based on the age, value is in calendar-years. @see \ref ScriptCalendarTime
 		OC_REQUIRES_SERVICE    = ::OCV_REQUIRES_SERVICE,   ///< Skip when the vehicle requires service, no value.
 		OC_UNCONDITIONALLY     = ::OCV_UNCONDITIONALLY,    ///< Always skip, no compare function, no value.
 		OC_REMAINING_LIFETIME  = ::OCV_REMAINING_LIFETIME, ///< Skip based on the remaining lifetime in calendar-years. @see \ref ScriptCalendarTime

src/script/api/script_story_page.hpp

@@ -282,7 +282,7 @@ public:
 	/**
 	 * Opens the Story Book if not yet open and selects the given page.
 	 * @param story_page_id The story page to update. If it is a global page, clients of all
-	 * companies are affecetd. Otherwise only the clients of the company which the page belongs
+	 * companies are affected. Otherwise only the clients of the company which the page belongs
 	 * to are affected.
 	 * @return True if the action succeeded.
 	 * @pre ScriptCompanyMode::IsDeity().

src/script/api/script_subsidy.hpp

@@ -50,7 +50,7 @@ public:
 
 	/**
 	 * Create a new subsidy.
-	 * @param cargo_type The type of cargo to cary for the subsidy.
+	 * @param cargo_type The type of cargo to carry for the subsidy.
 	 * @param from_type The type of the subsidy on the 'from' side.
 	 * @param from_id The ID of the 'from' side.
 	 * @param to_type The type of the subsidy on the 'to' side.

src/script/api/script_tile.hpp

@@ -415,7 +415,7 @@ public:
 	 * Raise the given corners of the tile. The corners can be combined,
 	 *  for example: SLOPE_N | SLOPE_W (= SLOPE_NW) will raise the west and the north corner.
 	 * @note The corners will be modified in the order west (first), south, east, north (last).
-	 *       Changing one corner might cause another corner to be changed too. So modifiing
+	 *       Changing one corner might cause another corner to be changed too. So modifying
 	 *       multiple corners may result in changing some corners by multiple steps.
 	 * @param tile The tile to raise.
 	 * @param slope Corners to raise (SLOPE_xxx).
@@ -432,7 +432,7 @@ public:
 	 * Lower the given corners of the tile. The corners can be combined,
 	 *  for example: SLOPE_N | SLOPE_W (= SLOPE_NW) will lower the west and the north corner.
 	 * @note The corners will be modified in the order west (first), south, east, north (last).
-	 *       Changing one corner might cause another corner to be changed too. So modifiing
+	 *       Changing one corner might cause another corner to be changed too. So modifying
 	 *       multiple corners may result in changing some corners by multiple steps.
 	 * @param tile The tile to lower.
 	 * @param slope Corners to lower (SLOPE_xxx).

src/script/api/script_vehicle.hpp

@@ -370,7 +370,7 @@ public:
 	 *   is owned by you.
 	 * @pre ScriptEngine::IsBuildable(engine_id).
 	 * @pre ScriptCargo::IsValidCargo(cargo).
-	 * @return The capacity the vehicle will have when refited.
+	 * @return The capacity the vehicle will have when refitted.
 	 */
 	static SQInteger GetBuildWithRefitCapacity(TileIndex depot, EngineID engine_id, CargoType cargo);
 
@@ -431,7 +431,7 @@ public:
 	 * @pre ScriptCargo::IsValidCargo(cargo).
 	 * @pre You must own the vehicle.
 	 * @pre The vehicle must be stopped in the depot.
-	 * @return The capacity the vehicle will have when refited.
+	 * @return The capacity the vehicle will have when refitted.
 	 */
 	static SQInteger GetRefitCapacity(VehicleID vehicle_id, CargoType cargo);
 

src/sound/xaudio2_s.cpp

@@ -167,7 +167,7 @@ std::optional<std::string_view> SoundDriver_XAudio2::Start(const StringList &par
 		CoUninitialize();
 
 		Debug(driver, 0, "xaudio2_s: XAudio2Create failed ({:08x})", (uint)hr);
-		return "Failed to inititialise the XAudio2 engine";
+		return "Failed to initialise the XAudio2 engine";
 	}
 
 	/* Create a mastering voice */

src/station_gui.cpp

@@ -888,7 +888,7 @@ typedef std::set<std::unique_ptr<CargoDataEntry>, CargoSorter> CargoDataSet;
 /**
  * A cargo data entry representing one possible row in the station view window's
  * top part. Cargo data entries form a tree where each entry can have several
- * children. Parents keep track of the sums of their childrens' cargo counts.
+ * children. Parents keep track of the sums of their children's cargo counts.
  */
 class CargoDataEntry {
 public:

src/strings_internal.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 strings_interal.h Types and functions related to the internal workings of formatting OpenTTD's strings. */
+/** @file strings_internal.h Types and functions related to the internal workings of formatting OpenTTD's strings. */
 
 #ifndef STRINGS_INTERNAL_H
 #define STRINGS_INTERNAL_H

src/subsidy_base.h

@@ -56,6 +56,6 @@ static const uint SUBSIDY_PAX_MIN_POPULATION   = 400; ///< Min. population of to
 static const uint SUBSIDY_CARGO_MIN_POPULATION = 900; ///< Min. population of destination town for cargo route
 static const uint SUBSIDY_MAX_PCT_TRANSPORTED  =  42; ///< Subsidy will be created only for towns/industries with less % transported
 static const uint SUBSIDY_MAX_DISTANCE         =  70; ///< Max. length of subsidised route (DistanceManhattan)
-static const uint SUBSIDY_TOWN_CARGO_RADIUS    =   6; ///< Extent of a tile area around town center when scanning for town cargo acceptance and production (6 ~= min catchmement + min station / 2)
+static const uint SUBSIDY_TOWN_CARGO_RADIUS    =   6; ///< Extent of a tile area around town center when scanning for town cargo acceptance and production (6 ~= min catchment + min station / 2)
 
 #endif /* SUBSIDY_BASE_H */

src/table/airport_defaults.h

@@ -114,7 +114,7 @@ static const std::initializer_list<AirportTileLayout> _tile_table_city = {
 	{ _tile_table_city_0, DIR_N },
 };
 
-/** Tiles for Metropolitain Airport (large) - 2 runways */
+/** Tiles for Metropolitan Airport (large) - 2 runways */
 static const std::initializer_list<AirportTileTable> _tile_table_metropolitan_0 = {
 	MK(0, 0, APT_BUILDING_1),
 	MK(1, 0, APT_APRON_FENCE_NW),

src/table/settings/locale_settings.ini

@@ -5,7 +5,7 @@
 ;
 
 ; Locale settings as stored in the main configuration file ("openttd.cfg") and
-; in the savegame PATS chunk. These settings are not sync'd over the network.
+; in the savegame PATS chunk. These settings are not synced over the network.
 
 [pre-amble]
 static std::pair<StringParameter, StringParameter> SettingsValueVelocityUnit(const IntSettingDesc &sd, int32_t value);

src/table/sprites.h

@@ -153,7 +153,7 @@ static const SpriteID SPR_GROUP_LIVERY_SHIP          = SPR_OPENTTD_BASE + 177;
 static const SpriteID SPR_GROUP_LIVERY_AIRCRAFT      = SPR_OPENTTD_BASE + 178;
 
 static const SpriteID SPR_TOWN_RATING_NA             = SPR_OPENTTD_BASE + 162;
-static const SpriteID SPR_TOWN_RATING_APALLING       = SPR_OPENTTD_BASE + 163;
+static const SpriteID SPR_TOWN_RATING_APPALLING      = SPR_OPENTTD_BASE + 163;
 static const SpriteID SPR_TOWN_RATING_MEDIOCRE       = SPR_OPENTTD_BASE + 164;
 static const SpriteID SPR_TOWN_RATING_GOOD           = SPR_OPENTTD_BASE + 165;
 

src/tests/test_script_admin.cpp

@@ -52,7 +52,7 @@ extern bool ScriptAdminMakeJSON(nlohmann::json &json, HSQUIRRELVM vm, SQInteger
 static std::optional<std::string> TestScriptAdminMakeJSON(std::string_view squirrel)
 {
 	auto vm = sq_open(1024);
-	/* sq_compile creates a closure with our snipper, which is a table.
+	/* sq_compile creates a closure with our snippet, which is a table.
 	 * Add "return " to get the table on the stack. */
 	std::string buffer = fmt::format("return {}", squirrel);
 

src/tilearea_type.h

@@ -77,7 +77,7 @@ struct DiagonalTileArea {
 	 * Construct this tile area with some set values.
 	 * @param tile The base tile.
 	 * @param a The "x" extent.
-	 * @param b The "y" estent.
+	 * @param b The "y" extent.
 	 */
 	DiagonalTileArea(TileIndex tile = INVALID_TILE, int16_t a = 0, int16_t b = 0) : tile(tile), a(a), b(b)
 	{

src/toolbar_gui.cpp

@@ -81,7 +81,7 @@ RailType _last_built_railtype;
 RoadType _last_built_roadtype;
 RoadType _last_built_tramtype;
 
-/** Toobar modes */
+/** Toolbar modes */
 enum ToolbarMode : uint8_t {
 	TB_NORMAL,
 	TB_UPPER,
@@ -1117,7 +1117,7 @@ void ToggleDirtyBlocks()
 }
 
 /**
- * Toggle drawing of widget outlihes.
+ * Toggle drawing of widget outlines.
  * @note has only an effect when newgrf_developer_tools are active.
  */
 void ToggleWidgetOutlines()
@@ -1426,8 +1426,8 @@ public:
 		this->current_y = given_height;
 
 		/* Figure out what are the visible buttons */
-		uint arrangable_count, button_count, spacer_count;
-		const WidgetID *arrangement = GetButtonArrangement(given_width, arrangable_count, button_count, spacer_count);
+		uint arrangeable_count, button_count, spacer_count;
+		const WidgetID *arrangement = GetButtonArrangement(given_width, arrangeable_count, button_count, spacer_count);
 
 		/* Create us ourselves a quick lookup table from WidgetID to slot. */
 		std::map<WidgetID, uint> lookup;
@@ -1448,8 +1448,8 @@ public:
 		uint button_i = 0;
 
 		/* Index into the arrangement indices. */
-		const WidgetID *slotp = rtl ? &arrangement[arrangable_count - 1] : arrangement;
-		for (uint i = 0; i < arrangable_count; i++) {
+		const WidgetID *slotp = rtl ? &arrangement[arrangeable_count - 1] : arrangement;
+		for (uint i = 0; i < arrangeable_count; i++) {
 			uint slot = lookup[*slotp];
 			auto &child_wid = this->children[slot];
 			/* If we have space to give to the spacers, do that. */
@@ -1495,24 +1495,24 @@ public:
 	/**
 	 * Get the arrangement of the buttons for the toolbar.
 	 * @param width the new width of the toolbar.
-	 * @param arrangable_count output of the number of visible items.
+	 * @param arrangeable_count output of the number of visible items.
 	 * @param button_count output of the number of visible buttons.
 	 * @param spacer_count output of the number of spacers.
 	 * @return the button configuration.
 	 */
-	virtual const WidgetID *GetButtonArrangement(uint &width, uint &arrangable_count, uint &button_count, uint &spacer_count) const = 0;
+	virtual const WidgetID *GetButtonArrangement(uint &width, uint &arrangeable_count, uint &button_count, uint &spacer_count) const = 0;
 };
 
 /** Container for the 'normal' main toolbar */
 class NWidgetMainToolbarContainer : public NWidgetToolbarContainer {
-	const WidgetID *GetButtonArrangement(uint &width, uint &arrangable_count, uint &button_count, uint &spacer_count) const override
+	const WidgetID *GetButtonArrangement(uint &width, uint &arrangeable_count, uint &button_count, uint &spacer_count) const override
 	{
 		static const uint SMALLEST_ARRANGEMENT = 14;
 		static const uint BIGGEST_ARRANGEMENT  = 20;
 
 		/* The number of buttons of each row of the toolbar should match the number of items which we want to be visible.
-		 * The total number of buttons should be equal to arrangable_count * 2.
-		 * No bad things happen, but we could see strange behaviours if we have buttons < (arrangable_count * 2) like a
+		 * The total number of buttons should be equal to arrangeable_count * 2.
+		 * No bad things happen, but we could see strange behaviours if we have buttons < (arrangeable_count * 2) like a
 		 * pause button appearing on the right of the lower toolbar and weird resizing of the widgets even if there is
 		 * enough space.
 		 */
@@ -1811,7 +1811,7 @@ class NWidgetMainToolbarContainer : public NWidgetToolbarContainer {
 		/* If at least BIGGEST_ARRANGEMENT fit, just spread all the buttons nicely */
 		uint full_buttons = std::max(CeilDiv(width, this->smallest_x), SMALLEST_ARRANGEMENT);
 		if (full_buttons > BIGGEST_ARRANGEMENT) {
-			button_count = arrangable_count = lengthof(arrange_all);
+			button_count = arrangeable_count = lengthof(arrange_all);
 			spacer_count = this->spacers;
 			return arrange_all;
 		}
@@ -1819,7 +1819,7 @@ class NWidgetMainToolbarContainer : public NWidgetToolbarContainer {
 		/* Introduce the split toolbar */
 		static const WidgetID * const arrangements[] = { arrange14, arrange15, arrange16, arrange17, arrange18, arrange19, arrange20 };
 
-		button_count = arrangable_count = full_buttons;
+		button_count = arrangeable_count = full_buttons;
 		spacer_count = this->spacers;
 		return arrangements[full_buttons - SMALLEST_ARRANGEMENT] + ((_toolbar_mode == TB_LOWER) ? full_buttons : 0);
 	}
@@ -1845,7 +1845,7 @@ class NWidgetScenarioToolbarContainer : public NWidgetToolbarContainer {
 		}
 	}
 
-	const WidgetID *GetButtonArrangement(uint &width, uint &arrangable_count, uint &button_count, uint &spacer_count) const override
+	const WidgetID *GetButtonArrangement(uint &width, uint &arrangeable_count, uint &button_count, uint &spacer_count) const override
 	{
 		static const WidgetID arrange_all[] = {
 			WID_TE_PAUSE,
@@ -1918,8 +1918,8 @@ class NWidgetScenarioToolbarContainer : public NWidgetToolbarContainer {
 		size_t min_full_width = (lengthof(arrange_all) - std::size(this->panel_widths)) * this->smallest_x + this->panel_widths[0] + this->panel_widths[1];
 		if (width >= min_full_width) {
 			width -= this->panel_widths[0] + this->panel_widths[1];
-			arrangable_count = lengthof(arrange_all);
-			button_count = arrangable_count - 2;
+			arrangeable_count = lengthof(arrange_all);
+			button_count = arrangeable_count - 2;
 			spacer_count = this->spacers;
 			return arrange_all;
 		}
@@ -1928,18 +1928,18 @@ class NWidgetScenarioToolbarContainer : public NWidgetToolbarContainer {
 		size_t min_small_width = (lengthof(arrange_switch) - std::size(this->panel_widths)) * this->smallest_x / 2 + this->panel_widths[1];
 		if (width > min_small_width) {
 			width -= this->panel_widths[1];
-			arrangable_count = lengthof(arrange_nopanel);
-			button_count = arrangable_count - 1;
+			arrangeable_count = lengthof(arrange_nopanel);
+			button_count = arrangeable_count - 1;
 			spacer_count = this->spacers - 1;
 			return arrange_nopanel;
 		}
 
 		/* Split toolbar */
 		width -= this->panel_widths[1];
-		arrangable_count = lengthof(arrange_switch) / 2;
-		button_count = arrangable_count - 1;
+		arrangeable_count = lengthof(arrange_switch) / 2;
+		button_count = arrangeable_count - 1;
 		spacer_count = 0;
-		return arrange_switch + ((_toolbar_mode == TB_LOWER) ? arrangable_count : 0);
+		return arrange_switch + ((_toolbar_mode == TB_LOWER) ? arrangeable_count : 0);
 	}
 };
 

src/town.h

@@ -213,7 +213,7 @@ enum TownCouncilAttitudes {
  */
 enum TownRatingCheckType {
 	ROAD_REMOVE         = 0,      ///< Removal of a road owned by the town.
-	TUNNELBRIDGE_REMOVE = 1,      ///< Removal of a tunnel or bridge owned by the towb.
+	TUNNELBRIDGE_REMOVE = 1,      ///< Removal of a tunnel or bridge owned by the town.
 	TOWN_RATING_CHECK_TYPE_COUNT, ///< Number of town checking action types.
 };
 

src/town_cmd.cpp

@@ -1427,7 +1427,7 @@ static bool GrowTownWithTunnel(const Town *t, const TileIndex tile, const DiagDi
 			slope_tile += delta;
 		}
 
-		/* More population means longer tunnels, but make sure we can at least cover the smallest mountain which neccesitates tunneling. */
+		/* More population means longer tunnels, but make sure we can at least cover the smallest mountain which necessitates tunneling. */
 		max_tunnel_length = (t->cache.population / 1000) + 7;
 	} else {
 		/* When tunneling under an obstruction, the length limit is 5, enough to tunnel under a four-track railway. */
@@ -1435,7 +1435,7 @@ static bool GrowTownWithTunnel(const Town *t, const TileIndex tile, const DiagDi
 	}
 
 	uint8_t tunnel_length = 0;
-	TileIndex tunnel_tile = tile; // Iteratator to store the other end tile of the tunnel.
+	TileIndex tunnel_tile = tile; // Iterator to store the other end tile of the tunnel.
 
 	/* Find the end tile of the tunnel for length and continuation checks. */
 	do {
@@ -1636,7 +1636,7 @@ static TownGrowthResult GrowTownInTile(TileIndex *tile_ptr, RoadBits cur_rb, Dia
 		if (cur_rb & target_rb) {
 			/* If it's a road turn possibly build a house in a corner.
 			 * Use intersection with straight road as an indicator
-			 * that we randomed corner house position.
+			 * that we randomised corner house position.
 			 * A turn (and we check for that later) always has only
 			 * one common bit with a straight road so it has the same
 			 * chance to be chosen as the house on the side of a road.

src/town_gui.cpp

@@ -870,7 +870,7 @@ public:
 					if (_game_mode == GM_EDITOR || !t->have_ratings.Test(_local_company)) {
 						DrawSprite(SPR_TOWN_RATING_NA, PAL_NONE, icon_x, tr.top + (this->resize.step_height - icon_size.height) / 2);
 					} else {
-						SpriteID icon = SPR_TOWN_RATING_APALLING;
+						SpriteID icon = SPR_TOWN_RATING_APPALLING;
 						if (t->ratings[_local_company] > RATING_VERYPOOR) icon = SPR_TOWN_RATING_MEDIOCRE;
 						if (t->ratings[_local_company] > RATING_GOOD)     icon = SPR_TOWN_RATING_GOOD;
 						DrawSprite(icon, PAL_NONE, icon_x, tr.top + (this->resize.step_height - icon_size.height) / 2);

src/tunnelbridge_cmd.cpp

@@ -267,7 +267,7 @@ static Money TunnelBridgeClearCost(TileIndex tile, Price base_price)
 		} break;
 
 		case TRANSPORT_RAIL: base_cost += RailClearCost(GetRailType(tile)); break;
-		/* Aquaducts have their own clear price. */
+		/* Aqueducts have their own clear price. */
 		case TRANSPORT_WATER: base_cost = _price[PR_CLEAR_AQUEDUCT]; break;
 		default: break;
 	}

src/vehicle_base.h

@@ -746,7 +746,7 @@ public:
 	/**
 	 * Copy certain configurations and statistics of a vehicle after successful autoreplace/renew
 	 * The function shall copy everything that cannot be copied by a command (like orders / group etc),
-	 * and that shall not be resetted for the new vehicle.
+	 * and that shall not be reset for the new vehicle.
 	 * @param src The old vehicle
 	 */
 	inline void CopyVehicleConfigAndStatistics(Vehicle *src)
@@ -1129,7 +1129,7 @@ struct SpecializedVehicle : public Vehicle {
 
 	/**
 	 * Gets vehicle with given index
-	 * @return pointer to vehicle with given index casted to T *
+	 * @return pointer to vehicle with given index cast to T *
 	 */
 	static inline T *Get(auto index)
 	{

src/vehicle_cmd.cpp

@@ -357,7 +357,7 @@ struct RefitResult {
  * @param new_subtype  Cargo subtype to refit to. 0xFF means to try keeping the same subtype according to GetBestFittingSubType().
  * @param flags        Command flags
  * @param auto_refit   Refitting is done as automatic refitting outside a depot.
- * @return Refit cost + refittet capacity + mail capacity (aircraft).
+ * @return Refit cost + refitted capacity + mail capacity (aircraft).
  */
 static std::tuple<CommandCost, uint, uint16_t, CargoArray> RefitVehicle(Vehicle *v, bool only_this, uint8_t num_vehicles, CargoType new_cargo_type, uint8_t new_subtype, DoCommandFlags flags, bool auto_refit)
 {

src/video/cocoa/cocoa_v.mm

@@ -141,7 +141,7 @@ std::optional<std::string_view> VideoDriver_Cocoa::Initialize()
 /**
  * Set dirty a rectangle managed by a cocoa video subdriver.
  * @param left Left x cooordinate of the dirty rectangle.
- * @param top Uppder y coordinate of the dirty rectangle.
+ * @param top Upper y coordinate of the dirty rectangle.
  * @param width Width of the dirty rectangle.
  * @param height Height of the dirty rectangle.
  */

src/viewport.cpp

@@ -1065,7 +1065,7 @@ static void DrawTileHighlightType(const TileInfo *ti, TileHighlightType tht)
 }
 
 /**
- * Highlights tiles insede local authority of selected towns.
+ * Highlights tiles inside local authority of selected towns.
  * @param *ti TileInfo Tile that is being drawn
  */
 static void HighlightTownLocalAuthorityTiles(const TileInfo *ti)
@@ -1104,7 +1104,7 @@ static void HighlightTownLocalAuthorityTiles(const TileInfo *ti)
  */
 static void DrawTileSelection(const TileInfo *ti)
 {
-	/* Highlight tiles insede local authority of selected towns. */
+	/* Highlight tiles inside local authority of selected towns. */
 	HighlightTownLocalAuthorityTiles(ti);
 
 	/* Draw a red error square? */
@@ -1590,7 +1590,7 @@ static void ViewportSortParentSprites(ParentSpriteToSortVector *psdv)
 	 * adding extra fields to ParentSpriteToDraw structure.
 	 */
 	const uint32_t ORDER_COMPARED = UINT32_MAX; // Sprite was compared but we still need to compare the ones preceding it
-	const uint32_t ORDER_RETURNED = UINT32_MAX - 1; // Makr sorted sprite in case there are other occurrences of it in the stack
+	const uint32_t ORDER_RETURNED = UINT32_MAX - 1; // Mark sorted sprite in case there are other occurrences of it in the stack
 	std::stack<ParentSpriteToDraw *> sprite_order;
 	uint32_t next_order = 0;
 

src/widget.cpp

@@ -1169,7 +1169,7 @@ void NWidgetCore::SetString(StringID string)
 
 /**
  * Set string and tool tip of the nested widget.
- * @param stringThe new string.
+ * @param string The new string.
  * @param tool_tip The new tool_tip.
  */
 void NWidgetCore::SetStringTip(StringID string, StringID tool_tip)
@@ -3397,7 +3397,7 @@ std::unique_ptr<NWidgetBase> MakeNWidgets(std::span<const NWidgetPart> nwid_part
  * between the title bar and the window body if the first widget in the parts array looks like a title bar (it is a horizontal
  * container with a caption widget) and has a shade box widget.
  * @param nwid_parts Span of nested widget parts.
- * @param[out] shade_select Pointer to the inserted shade selection widget (\c nullptr if not unserted).
+ * @param[out] shade_select Pointer to the inserted shade selection widget (\c nullptr if not inserted).
  * @return Root of the nested widget tree, a vertical container containing the entire GUI.
  * @ingroup NestedWidgetParts
  */

src/widget_type.h

@@ -541,7 +541,7 @@ public:
 
 	void AdjustPaddingForZoom() override;
 	void SetPIP(uint8_t pip_pre, uint8_t pip_inter, uint8_t pip_post);
-	void SetPIPRatio(uint8_t pip_ratio_pre, uint8_t pip_ratio_inter, uint8_t pip_rato_post);
+	void SetPIPRatio(uint8_t pip_ratio_pre, uint8_t pip_ratio_inter, uint8_t pip_ratio_post);
 
 protected:
 	NWidContainerFlags flags{}; ///< Flags of the container.

src/window.cpp

@@ -706,7 +706,7 @@ static void DispatchLeftClickEvent(Window *w, int x, int y, int click_count)
 				int dx = (w->resize.step_width  == 0) ? 0 : def_width  - w->width;
 				int dy = (w->resize.step_height == 0) ? 0 : def_height - w->height;
 				/* dx and dy has to go by step.. calculate it.
-				 * The cast to int is necessary else dx/dy are implicitly casted to unsigned int, which won't work. */
+				 * The cast to int is necessary else dx/dy are implicitly cast to unsigned int, which won't work. */
 				if (w->resize.step_width  > 1) dx -= dx % (int)w->resize.step_width;
 				if (w->resize.step_height > 1) dy -= dy % (int)w->resize.step_height;
 				ResizeWindow(w, dx, dy, false);
@@ -996,7 +996,7 @@ void Window::ReInit(int rx, int ry, bool reposition)
 	int dx = (this->resize.step_width  == 0) ? 0 : window_width  - this->width;
 	int dy = (this->resize.step_height == 0) ? 0 : window_height - this->height;
 	/* dx and dy has to go by step.. calculate it.
-	 * The cast to int is necessary else dx/dy are implicitly casted to unsigned int, which won't work. */
+	 * The cast to int is necessary else dx/dy are implicitly cast to unsigned int, which won't work. */
 	if (this->resize.step_width  > 1) dx -= dx % (int)this->resize.step_width;
 	if (this->resize.step_height > 1) dy -= dy % (int)this->resize.step_height;
 
@@ -1490,7 +1490,7 @@ void Window::FindWindowPlacementAndResize(int def_width, int def_height, bool al
 			int enlarge_y = std::max(std::min(def_height - this->height, free_height   - this->height), 0);
 
 			/* X and Y has to go by step.. calculate it.
-			 * The cast to int is necessary else x/y are implicitly casted to
+			 * The cast to int is necessary else x/y are implicitly cast to
 			 * unsigned int, which won't work. */
 			if (this->resize.step_width  > 1) enlarge_x -= enlarge_x % (int)this->resize.step_width;
 			if (this->resize.step_height > 1) enlarge_y -= enlarge_y % (int)this->resize.step_height;
@@ -2066,7 +2066,7 @@ static void EnsureVisibleCaption(Window *w, int nx, int ny)
  * Resize the window.
  * Update all the widgets of a window based on their resize flags
  * Both the areas of the old window and the new sized window are set dirty
- * ensuring proper redrawal.
+ * ensuring proper redrawing.
  * @param w       Window to resize
  * @param delta_x Delta x-size of changed window (positive if larger, etc.)
  * @param delta_y Delta y-size of changed window
@@ -2266,7 +2266,7 @@ static EventState HandleWindowDragging()
 			}
 
 			/* X and Y has to go by step.. calculate it.
-			 * The cast to int is necessary else x/y are implicitly casted to
+			 * The cast to int is necessary else x/y are implicitly cast to
 			 * unsigned int, which won't work. */
 			if (w->resize.step_width  > 1) x -= x % (int)w->resize.step_width;
 			if (w->resize.step_height > 1) y -= y % (int)w->resize.step_height;
@@ -2293,7 +2293,7 @@ static EventState HandleWindowDragging()
 				_drag_delta.x += x;
 			}
 
-			/* ResizeWindow sets both pre- and after-size to dirty for redrawal */
+			/* ResizeWindow sets both pre- and after-size to dirty for redrawing */
 			ResizeWindow(w, x, y);
 			return ES_HANDLED;
 		}
@@ -2377,7 +2377,7 @@ static void HandleScrollbarScrolling(Window *w)
 }
 
 /**
- * Handle active widget (mouse draggin on widget) with the mouse.
+ * Handle active widget (mouse dragging on widget) with the mouse.
  * @return State of handling the event.
  */
 static EventState HandleActiveWidget()