Change: Use gender-neutral pronouns

36 files changed, 47 insertions, 45 deletions

diff --git a/src/aircraft_cmd.cpp b/src/aircraft_cmd.cpp
index 2d47b560f..445798327 100644
--- a/src/aircraft_cmd.cpp
+++ b/src/aircraft_cmd.cpp
@@ -1025,7 +1025,7 @@ static bool AircraftController(Aircraft *v)
 	if (count == 0) return false;
 
 	/* If the plane will be a few subpixels away from the destination after
-	 * this movement loop, start nudging him towards the exact position for
+	 * this movement loop, start nudging it towards the exact position for
 	 * the whole loop. Otherwise, heavily depending on the speed of the plane,
 	 * it is possible we totally overshoot the target, causing the plane to
 	 * make a loop, and trying again, and again, and again .. */
diff --git a/src/blitter/factory.hpp b/src/blitter/factory.hpp
index 94f3f9998..322b11c95 100644
--- a/src/blitter/factory.hpp
+++ b/src/blitter/factory.hpp
@@ -91,7 +91,7 @@ public:
 	}
 
 	/**
-	 * Find the requested blitter and return his class.
+	 * Find the requested blitter and return its class.
 	 * @param name the blitter to select.
 	 * @post Sets the blitter so GetCurrentBlitter() returns it too.
 	 */
diff --git a/src/console_internal.h b/src/console_internal.h
index ca2f92193..80752a08e 100644
--- a/src/console_internal.h
+++ b/src/console_internal.h
@@ -29,7 +29,7 @@ enum ConsoleHookResult {
  * effect they produce are carried out. The arguments to the commands
  * are given to them, each input word separated by a double-quote (") is an argument
  * If you want to handle multiple words as one, enclose them in double-quotes
- * eg. 'say "hello sexy boy"'
+ * eg. 'say "hello everybody"'
  */
 typedef bool IConsoleCmdProc(byte argc, char *argv[]);
 typedef ConsoleHookResult IConsoleHook(bool echo);
diff --git a/src/economy.cpp b/src/economy.cpp
index ae289a51d..09adf81b9 100644
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -311,7 +311,7 @@ void ChangeOwnershipOfCompanyItems(Owner old_owner, Owner new_owner)
 		for (const Company *c : Company::Iterate()) {
 			for (i = 0; i < 4; i++) {
 				if (c->share_owners[i] == old_owner) {
-					/* Sell his shares */
+					/* Sell its shares */
 					CommandCost res = DoCommand(0, c->index, 0, DC_EXEC | DC_BANKRUPT, CMD_SELL_SHARE_IN_COMPANY);
 					/* Because we are in a DoCommand, we can't just execute another one and
 					 *  expect the money to be removed. We need to do it ourself! */
@@ -337,7 +337,7 @@ void ChangeOwnershipOfCompanyItems(Owner old_owner, Owner new_owner)
 	}
 
 	/* Temporarily increase the company's money, to be sure that
-	 * removing his/her property doesn't fail because of lack of money.
+	 * removing their property doesn't fail because of lack of money.
 	 * Not too drastically though, because it could overflow */
 	if (new_owner == INVALID_OWNER) {
 		Company::Get(old_owner)->money = UINT64_MAX >> 2; // jackpot ;p
diff --git a/src/graph_gui.cpp b/src/graph_gui.cpp
index c50027718..10433fc09 100644
--- a/src/graph_gui.cpp
+++ b/src/graph_gui.cpp
@@ -1417,7 +1417,7 @@ struct PerformanceRatingDetailWindow : Window {
 		int64 needed = _score_info[score_type].needed;
 		int   score  = _score_info[score_type].score;
 
-		/* SCORE_TOTAL has his own rules ;) */
+		/* SCORE_TOTAL has its own rules ;) */
 		if (score_type == SCORE_TOTAL) {
 			for (ScoreID i = SCORE_BEGIN; i < SCORE_END; i++) score += _score_info[i].score;
 			needed = SCORE_MAX;
diff --git a/src/heightmap.cpp b/src/heightmap.cpp
index 7b070f440..458b0c910 100644
--- a/src/heightmap.cpp
+++ b/src/heightmap.cpp
@@ -480,7 +480,7 @@ bool GetHeightmapDimensions(DetailedFileType dft, const char *filename, uint *x,
 }
 
 /**
- * Load a heightmap from file and change the map in his current dimensions
+ * Load a heightmap from file and change the map in its current dimensions
  *  to a landscape representing the heightmap.
  * It converts pixels to height. The brighter, the higher.
  * @param dft Type of image file.
diff --git a/src/linkgraph/linkgraphjob.cpp b/src/linkgraph/linkgraphjob.cpp
index 6a70e9fb6..8e5ec3283 100644
--- a/src/linkgraph/linkgraphjob.cpp
+++ b/src/linkgraph/linkgraphjob.cpp
@@ -65,7 +65,7 @@ void LinkGraphJob::SpawnThread()
 		 * On the other hand, if you want to play games which make this hang noticeably
 		 * on a platform without threads then you'll probably get other problems first.
 		 * OK:
-		 * If someone comes and tells me that this hangs for him/her, I'll implement a
+		 * If someone comes and tells me that this hangs for them, I'll implement a
 		 * smaller grained "Step" method for all handlers and add some more ticks where
 		 * "Step" is called. No problem in principle. */
 		LinkGraphSchedule::Run(this);
diff --git a/src/misc_cmd.cpp b/src/misc_cmd.cpp
index 2d1bbdf7a..f9a102d1a 100644
--- a/src/misc_cmd.cpp
+++ b/src/misc_cmd.cpp
@@ -129,7 +129,7 @@ CommandCost CmdDecreaseLoan(TileIndex tile, DoCommandFlag flags, uint32 p1, uint
  * In case of an unsafe unpause, we want the
  * user to confirm that it might crash.
  * @param w         unused
- * @param confirmed whether the user confirms his/her action
+ * @param confirmed whether the user confirmed their action
  */
 static void AskUnsafeUnpauseCallback(Window *w, bool confirmed)
 {
diff --git a/src/network/core/tcp_game.h b/src/network/core/tcp_game.h
index 5fe9cd465..90b7184f0 100644
--- a/src/network/core/tcp_game.h
+++ b/src/network/core/tcp_game.h
@@ -274,7 +274,7 @@ protected:
 	virtual NetworkRecvStatus Receive_CLIENT_COMPANY_PASSWORD(Packet *p);
 
 	/**
-	 * The client is joined and ready to receive his map:
+	 * The client is joined and ready to receive their map:
 	 * uint32  Own client ID.
 	 * uint32  Generation seed.
 	 * string  Network ID of the server.
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 80ecfc2cd..2c5390dc0 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -269,8 +269,8 @@ void NetworkTextMessage(NetworkAction action, TextColour colour, bool self_send,
 uint NetworkCalculateLag(const NetworkClientSocket *cs)
 {
 	int lag = cs->last_frame_server - cs->last_frame;
-	/* This client has missed his ACK packet after 1 DAY_TICKS..
-	 *  so we increase his lag for every frame that passes!
+	/* This client has missed their ACK packet after 1 DAY_TICKS..
+	 *  so we increase their lag for every frame that passes!
 	 * The packet can be out by a max of _net_frame_freq */
 	if (cs->last_frame_server + DAY_TICKS + _settings_client.network.frame_freq < _frame_counter) {
 		lag += _frame_counter - (cs->last_frame_server + DAY_TICKS + _settings_client.network.frame_freq);
@@ -680,7 +680,7 @@ public:
 };
 
 /**
- * Query a server to fetch his game-info for the lobby.
+ * Query a server to fetch the game-info for the lobby.
  * @param connection_string the address to query.
  */
 void NetworkQueryLobbyServer(const std::string &connection_string)
diff --git a/src/network/network_chat_gui.cpp b/src/network/network_chat_gui.cpp
index e8fbf0f12..82d9a819b 100644
--- a/src/network/network_chat_gui.cpp
+++ b/src/network/network_chat_gui.cpp
@@ -128,7 +128,7 @@ void NetworkUndrawChatMessage()
 	/* Sometimes we also need to hide the cursor
 	 *   This is because both textmessage and the cursor take a shot of the
 	 *   screen before drawing.
-	 *   Now the textmessage takes his shot and paints his data before the cursor
+	 *   Now the textmessage takes its shot and paints its data before the cursor
 	 *   does, so in the shot of the cursor is the screen-data of the textmessage
 	 *   included when the cursor hangs somewhere over the textmessage. To
 	 *   avoid wrong repaints, we undraw the cursor in that case, and everything
diff --git a/src/network/network_gui.h b/src/network/network_gui.h
index e4ccf4e78..f435efbcd 100644
--- a/src/network/network_gui.h
+++ b/src/network/network_gui.h
@@ -32,7 +32,7 @@ struct NetworkCompanyInfo : NetworkCompanyStats {
 	Money company_value;                            ///< The company value
 	Money money;                                    ///< The amount of money the company has
 	Money income;                                   ///< How much did the company earned last year
-	uint16 performance;                             ///< What was his performance last month?
+	uint16 performance;                             ///< What was their performance last month?
 	bool use_password;                              ///< Is there a password
 	char clients[NETWORK_CLIENTS_LENGTH];           ///< The clients that control this company (Name1, name2, ..)
 };
diff --git a/src/network/network_server.cpp b/src/network/network_server.cpp
index 7b77c76c4..91ab8bd9c 100644
--- a/src/network/network_server.cpp
+++ b/src/network/network_server.cpp
@@ -472,7 +472,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::SendError(NetworkErrorCode err
 		DEBUG(net, 1, "Client %d made an error and has been disconnected: %s", this->client_id, str);
 	}
 
-	/* The client made a mistake, so drop his connection now! */
+	/* The client made a mistake, so drop the connection now! */
 	return this->CloseConnection(NETWORK_RECV_STATUS_SERVER_ERROR);
 }
 
@@ -858,7 +858,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_NEWGRFS_CHECKED
 
 	NetworkClientInfo *ci = this->GetInfo();
 
-	/* We now want a password from the client else we do not allow him in! */
+	/* We now want a password from the client else we do not allow them in! */
 	if (!_settings_client.network.server_password.empty()) {
 		return this->SendNeedGamePassword();
 	}
@@ -995,7 +995,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_COMPANY_PASSWOR
 NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_GETMAP(Packet *p)
 {
 	/* The client was never joined.. so this is impossible, right?
-	 *  Ignore the packet, give the client a warning, and close his connection */
+	 *  Ignore the packet, give the client a warning, and close the connection */
 	if (this->status < STATUS_AUTHORIZED || this->HasClientQuit()) {
 		return this->SendError(NETWORK_ERROR_NOT_AUTHORIZED);
 	}
@@ -1063,7 +1063,7 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_MAP_OK(Packet *
 NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_COMMAND(Packet *p)
 {
 	/* The client was never joined.. so this is impossible, right?
-	 *  Ignore the packet, give the client a warning, and close his connection */
+	 *  Ignore the packet, give the client a warning, and close the connection */
 	if (this->status < STATUS_DONE_MAP || this->HasClientQuit()) {
 		return this->SendError(NETWORK_ERROR_NOT_EXPECTED);
 	}
@@ -1857,7 +1857,7 @@ void NetworkServer_Tick(bool send_frame)
 					 * spamming the client. Strictly speaking this variable
 					 * tracks when we last received a packet from the client,
 					 * but as it is waiting, it will not send us any till we
-					 * start sending him data. */
+					 * start sending them data. */
 					cs->last_packet = std::chrono::steady_clock::now();
 				}
 				break;
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index d2b3449c9..5ddfcaddd 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -3185,7 +3185,7 @@ static ChangeInfoResult IndustrytilesChangeInfo(uint indtid, int numinfo, int pr
 
 					/* A copied tile should not have the animation infos copied too.
 					 * The anim_state should be left untouched, though
-					 * It is up to the author to animate them himself */
+					 * It is up to the author to animate them */
 					tsp->anim_production = INDUSTRYTILE_NOANIM;
 					tsp->anim_next = INDUSTRYTILE_NOANIM;
 
diff --git a/src/newgrf_airporttiles.cpp b/src/newgrf_airporttiles.cpp
index a04906451..221d9aef4 100644
--- a/src/newgrf_airporttiles.cpp
+++ b/src/newgrf_airporttiles.cpp
@@ -155,7 +155,7 @@ static uint32 GetAirportTileIDAtOffset(TileIndex tile, const Station *st, uint32
 		}
 	}
 	/* The tile has no spritegroup */
-	return 0xFF << 8 | ats->grf_prop.subst_id; // so just give him the substitute
+	return 0xFF << 8 | ats->grf_prop.subst_id; // so just give it the substitute
 }
 
 /* virtual */ uint32 AirportTileScopeResolver::GetVariable(byte variable, uint32 parameter, bool *available) const
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index 64eed8139..55674a60d 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -264,7 +264,7 @@ void IndustryOverrideManager::SetEntitySpec(IndustrySpec *inds)
 
 	if (ind_id == invalid_ID) {
 		/* Not found.
-		 * Or it has already been overridden, so you've lost your place old boy.
+		 * Or it has already been overridden, so you've lost your place.
 		 * Or it is a simple substitute.
 		 * We need to find a free available slot */
 		ind_id = this->AddEntityID(inds->grf_prop.local_id, inds->grf_prop.grffile->grfid, inds->grf_prop.subst_id);
@@ -319,7 +319,7 @@ void ObjectOverrideManager::SetEntitySpec(ObjectSpec *spec)
 
 	if (type == invalid_ID) {
 		/* Not found.
-		 * Or it has already been overridden, so you've lost your place old boy.
+		 * Or it has already been overridden, so you've lost your place.
 		 * Or it is a simple substitute.
 		 * We need to find a free available slot */
 		type = this->AddEntityID(spec->grf_prop.local_id, spec->grf_prop.grffile->grfid, OBJECT_TRANSMITTER);
diff --git a/src/newgrf_industries.cpp b/src/newgrf_industries.cpp
index abae44604..55f80e974 100644
--- a/src/newgrf_industries.cpp
+++ b/src/newgrf_industries.cpp
@@ -85,7 +85,7 @@ uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i, uint32 cur_grfid
 		}
 	}
 	/* The tile has no spritegroup */
-	return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give him the substitute
+	return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give it the substitute
 }
 
 static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
diff --git a/src/openttd.cpp b/src/openttd.cpp
index fec8bf9ca..5a4e73593 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -965,7 +965,7 @@ bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileTy
 
 void SwitchToMode(SwitchMode new_mode)
 {
-	/* If we are saving something, the network stays in his current state */
+	/* If we are saving something, the network stays in its current state */
 	if (new_mode != SM_SAVE_GAME) {
 		/* If the network is active, make it not-active */
 		if (_networking) {
diff --git a/src/order_cmd.cpp b/src/order_cmd.cpp
index c4793fa33..70fce860b 100644
--- a/src/order_cmd.cpp
+++ b/src/order_cmd.cpp
@@ -1039,7 +1039,7 @@ static void CancelLoadingDueToDeletedOrder(Vehicle *v)
 {
 	assert(v->current_order.IsType(OT_LOADING));
 	/* NON-stop flag is misused to see if a train is in a station that is
-	 * on his order list or not */
+	 * on its order list or not */
 	v->current_order.SetNonStopType(ONSF_STOP_EVERYWHERE);
 	/* When full loading, "cancel" that order so the vehicle doesn't
 	 * stay indefinitely at this station anymore. */
diff --git a/src/pathfinder/npf/aystar.cpp b/src/pathfinder/npf/aystar.cpp
index b14053b7c..163d7859e 100644
--- a/src/pathfinder/npf/aystar.cpp
+++ b/src/pathfinder/npf/aystar.cpp
@@ -144,14 +144,14 @@ void AyStar::CheckTile(AyStarNode *current, OpenListNode *parent)
 		/* Re-add it in the openlist_queue. */
 		this->openlist_queue.Push(check, new_f);
 	} else {
-		/* A new node, add him to the OpenList */
+		/* A new node, add it to the OpenList */
 		this->OpenListAdd(closedlist_parent, current, new_f, new_g);
 	}
 }
 
 /**
  * This function is the core of %AyStar. It handles one item and checks
- * his neighbour items. If they are valid, they are added to be checked too.
+ * its neighbour items. If they are valid, they are added to be checked too.
  * @return Possible values:
  *  - #AYSTAR_EMPTY_OPENLIST : indicates all items are tested, and no path has been found.
  *  - #AYSTAR_LIMIT_REACHED : Indicates that the max_search_nodes limit has been reached.
diff --git a/src/rail_gui.cpp b/src/rail_gui.cpp
index 3cb99d785..e7221d01c 100644
--- a/src/rail_gui.cpp
+++ b/src/rail_gui.cpp
@@ -410,7 +410,7 @@ static void HandleAutoSignalPlacement()
 	}
 
 	/* _settings_client.gui.drag_signals_density is given as a parameter such that each user
-	 * in a network game can specify his/her own signal density */
+	 * in a network game can specify their own signal density */
 	DoCommandP(TileVirtXY(_thd.selstart.x, _thd.selstart.y), TileVirtXY(_thd.selend.x, _thd.selend.y), p2,
 			_remove_button_clicked ?
 			CMD_REMOVE_SIGNAL_TRACK | CMD_MSG(STR_ERROR_CAN_T_REMOVE_SIGNALS_FROM) :
diff --git a/src/saveload/afterload.cpp b/src/saveload/afterload.cpp
index 26c749bf7..f60c12b91 100644
--- a/src/saveload/afterload.cpp
+++ b/src/saveload/afterload.cpp
@@ -179,7 +179,7 @@ static void UpdateExclusiveRights()
 	 *     Build an array town_blocked[ town_id ][ company_id ]
 	 *     that stores if at least one station in that town is blocked for a company
 	 * 2.) Go through that array, if you find a town that is not blocked for
-	 *     one company, but for all others, then give him exclusivity.
+	 *     one company, but for all others, then give it exclusivity.
 	 */
 }
 
diff --git a/src/saveload/ai_sl.cpp b/src/saveload/ai_sl.cpp
index 4c751117f..3bc1d0f87 100644
--- a/src/saveload/ai_sl.cpp
+++ b/src/saveload/ai_sl.cpp
@@ -51,7 +51,7 @@ static void SaveReal_AIPL(int *index_ptr)
 	_ai_saveload_settings = config->SettingsToString();
 
 	SlObject(nullptr, _ai_company);
-	/* If the AI was active, store his data too */
+	/* If the AI was active, store its data too */
 	if (Company::IsValidAiID(index)) AI::Save(index);
 }
 
diff --git a/src/saveload/saveload.cpp b/src/saveload/saveload.cpp
index 34982ecfe..442ab9135 100644
--- a/src/saveload/saveload.cpp
+++ b/src/saveload/saveload.cpp
@@ -2618,7 +2618,7 @@ static SaveOrLoadResult DoLoad(LoadFilter *reader, bool load_check)
 			fmt = _saveload_formats;
 			for (;;) {
 				if (fmt == endof(_saveload_formats)) {
-					/* Who removed LZO support? Bad bad boy! */
+					/* Who removed LZO support? */
 					NOT_REACHED();
 				}
 				if (fmt->tag == TO_BE32X('OTTD')) break;
diff --git a/src/script/api/script_controller.cpp b/src/script/api/script_controller.cpp
index e74f27e4a..8af7b87a3 100644
--- a/src/script/api/script_controller.cpp
+++ b/src/script/api/script_controller.cpp
@@ -54,7 +54,7 @@
 	seprintf(log_message, lastof(log_message), "Break: %s", message);
 	ScriptLog::Log(ScriptLog::LOG_SQ_ERROR, log_message);
 
-	/* Inform script developer that his script has been paused and
+	/* Inform script developer that their script has been paused and
 	 * needs manual action to continue. */
 	ShowAIDebugWindow(ScriptObject::GetRootCompany());
 
diff --git a/src/script/api/script_object.cpp b/src/script/api/script_object.cpp
index 6275d1be3..85a85cca1 100644
--- a/src/script/api/script_object.cpp
+++ b/src/script/api/script_object.cpp
@@ -365,7 +365,7 @@ ScriptObject::ActiveInstance::~ActiveInstance()
 		IncreaseDoCommandCosts(res.GetCost());
 
 		/* Suspend the script player for 1+ ticks, so it simulates multiplayer. This
-		 *  both avoids confusion when a developer launched his script in a
+		 *  both avoids confusion when a developer launched the script in a
 		 *  multiplayer game, but also gives time for the GUI and human player
 		 *  to interact with the game. */
 		throw Script_Suspend(GetDoCommandDelay(), callback);
diff --git a/src/script/api/script_waypointlist.hpp b/src/script/api/script_waypointlist.hpp
index 0ee33eff6..f05754b1e 100644
--- a/src/script/api/script_waypointlist.hpp
+++ b/src/script/api/script_waypointlist.hpp
@@ -34,7 +34,9 @@ public:
 class ScriptWaypointList_Vehicle : public ScriptList {
 public:
 	/**
-	 * @param vehicle_id The vehicle to get the list of waypoints he has in its orders from.
+	 * Get the waypoints from the orders of the given vehicle. Duplicates are
+	 * not added. Waypoints are added in the order of the vehicle's orders.
+	 * @param vehicle_id The vehicle to get the list of waypoints for.
 	 */
 	ScriptWaypointList_Vehicle(VehicleID vehicle_id);
 };
diff --git a/src/script/script_config.hpp b/src/script/script_config.hpp
index 7ddc0ab6a..13a136cbb 100644
--- a/src/script/script_config.hpp
+++ b/src/script/script_config.hpp
@@ -116,7 +116,7 @@ public:
 	void AnchorUnchangeableSettings();
 
 	/**
-	 * Get the value of a setting for this config. It might fallback to his
+	 * Get the value of a setting for this config. It might fallback to its
 	 *  'info' to find the default value (if not set or if not-custom difficulty
 	 *  level).
 	 * @return The (default) value of the setting, or -1 if the setting was not
diff --git a/src/script/script_info_dummy.cpp b/src/script/script_info_dummy.cpp
index 063c028cc..9438b77f0 100644
--- a/src/script/script_info_dummy.cpp
+++ b/src/script/script_info_dummy.cpp
@@ -15,7 +15,7 @@
 
 #include "../safeguards.h"
 
-/* The reason this exists in C++, is that a user can trash his ai/ or game/ dir,
+/* The reason this exists in C++, is that a user can trash their ai/ or game/ dir,
  *  leaving no Scripts available. The complexity to solve this is insane, and
  *  therefore the alternative is used, and make sure there is always a Script
  *  available, no matter what the situation is. By defining it in C++, there
diff --git a/src/script/script_instance.hpp b/src/script/script_instance.hpp
index c097e0eb7..4709c44e2 100644
--- a/src/script/script_instance.hpp
+++ b/src/script/script_instance.hpp
@@ -55,7 +55,7 @@ public:
 	virtual class ScriptInfo *FindLibrary(const char *library, int version) = 0;
 
 	/**
-	 * A script in multiplayer waits for the server to handle his DoCommand.
+	 * A script in multiplayer waits for the server to handle its DoCommand.
 	 *  It keeps waiting for this until this function is called.
 	 */
 	void Continue();
diff --git a/src/settings_type.h b/src/settings_type.h
index bba95ad96..39a73b3ed 100644
--- a/src/settings_type.h
+++ b/src/settings_type.h
@@ -125,7 +125,7 @@ struct GUISettings {
 	bool   autosave_on_network_disconnect;   ///< save an autosave when you get disconnected from a network game with an error?
 	uint8  date_format_in_default_names;     ///< should the default savegame/screenshot name use long dates (31th Dec 2008), short dates (31-12-2008) or ISO dates (2008-12-31)
 	byte   max_num_autosaves;                ///< controls how many autosavegames are made before the game starts to overwrite (names them 0 to max_num_autosaves - 1)
-	bool   population_in_label;              ///< show the population of a town in his label?
+	bool   population_in_label;              ///< show the population of a town in its label?
 	uint8  right_mouse_btn_emulation;        ///< should we emulate right mouse clicking?
 	uint8  scrollwheel_scrolling;            ///< scrolling using the scroll wheel?
 	uint8  scrollwheel_multiplier;           ///< how much 'wheel' per incoming event from the OS?
diff --git a/src/ship_cmd.cpp b/src/ship_cmd.cpp
index ca159531a..415d97ebc 100644
--- a/src/ship_cmd.cpp
+++ b/src/ship_cmd.cpp
@@ -257,7 +257,7 @@ Trackdir Ship::GetVehicleTrackdir() const
 	}
 
 	if (this->state == TRACK_BIT_WORMHOLE) {
-		/* ship on aqueduct, so just use his direction and assume a diagonal track */
+		/* ship on aqueduct, so just use its direction and assume a diagonal track */
 		return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
 	}
 
diff --git a/src/station_cmd.cpp b/src/station_cmd.cpp
index eecb08d7c..d1e12604c 100644
--- a/src/station_cmd.cpp
+++ b/src/station_cmd.cpp
@@ -3468,7 +3468,7 @@ static void UpdateStationRating(Station *st)
 
 	for (const CargoSpec *cs : CargoSpec::Iterate()) {
 		GoodsEntry *ge = &st->goods[cs->Index()];
-		/* Slowly increase the rating back to his original level in the case we
+		/* Slowly increase the rating back to its original level in the case we
 		 *  didn't deliver cargo yet to this station. This happens when a bribe
 		 *  failed while you didn't moved that cargo yet to a station. */
 		if (!ge->HasRating() && ge->rating < INITIAL_STATION_RATING) {
diff --git a/src/strings.cpp b/src/strings.cpp
index fb1943870..8c9ac0aaf 100644
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -836,7 +836,7 @@ static char *FormatString(char *buff, const char *str_arg, StringParameters *arg
 		const char *&str = str_stack.top();
 
 		if (SCC_NEWGRF_FIRST <= b && b <= SCC_NEWGRF_LAST) {
-			/* We need to pass some stuff as it might be modified; oh boy. */
+			/* We need to pass some stuff as it might be modified. */
 			//todo: should argve be passed here too?
 			b = RemapNewGRFStringControlCode(b, buf_start, &buff, &str, (int64 *)args->GetDataPointer(), args->GetDataLeft(), dry_run);
 			if (b == 0) continue;
diff --git a/src/table/settings.ini b/src/table/settings.ini
index 66dc55e9b..eea30e003 100644
--- a/src/table/settings.ini
+++ b/src/table/settings.ini
@@ -56,7 +56,7 @@ static bool UpdateClientConfigValues(int32 p1);
  * It is also a bit tricky since you would think that service_interval
  * for example doesn't need to be synched. Every client assigns the
  * service_interval value to the v->service_interval, meaning that every client
- * assigns his value. If the setting was company-based, that would mean that
+ * assigns its own value. If the setting was company-based, that would mean that
  * vehicles could decide on different moments that they are heading back to a
  * service depot, causing desyncs on a massive scale. */
 const SettingDesc _settings[] = {
diff --git a/src/train_cmd.cpp b/src/train_cmd.cpp
index 169fb9d71..dc87827a7 100644
--- a/src/train_cmd.cpp
+++ b/src/train_cmd.cpp
@@ -4026,7 +4026,7 @@ Trackdir Train::GetVehicleTrackdir() const
 	}
 
 	if (this->track == TRACK_BIT_WORMHOLE) {
-		/* train in tunnel or on bridge, so just use his direction and assume a diagonal track */
+		/* train in tunnel or on bridge, so just use its direction and assume a diagonal track */
 		return DiagDirToDiagTrackdir(DirToDiagDir(this->direction));
 	}