diff --git a/Source/appfat.cpp b/Source/appfat.cpp
index 6c5f70c03..0391327f4 100644
--- a/Source/appfat.cpp
+++ b/Source/appfat.cpp
@@ -156,9 +156,10 @@ void InsertCDDlg()
 	snprintf(
 	    text,
 	    1024,
+	    "%s",
 	    _("Unable to open main data archive (diabdat.mpq or spawn.mpq).\n"
-	    "\n"
-	    "Make sure that it is in the game folder and that the file name is in all lowercase."));
+	      "\n"
+	      "Make sure that it is in the game folder and that the file name is in all lowercase."));
 
 	UiErrorOkDialog(_("Data File Error"), text);
 	app_fatal(nullptr);
diff --git a/Source/diablo.cpp b/Source/diablo.cpp
index 7cca1e985..f0e5ec67f 100644
--- a/Source/diablo.cpp
+++ b/Source/diablo.cpp
@@ -157,7 +157,7 @@ extern void plrctrls_after_game_logic();
 
 [[noreturn]] static void print_help_and_exit()
 {
-	printInConsole(_("Options:\n"));
+	printInConsole("%s", _("Options:\n"));
 	printInConsole("    %-20s %-30s\n", "-h, --help", _("Print this message and exit"));
 	printInConsole("    %-20s %-30s\n", "--version", _("Print the version and exit"));
 	printInConsole("    %-20s %-30s\n", "--data-dir", _("Specify the folder of diabdat.mpq"));
@@ -170,7 +170,7 @@ extern void plrctrls_after_game_logic();
 	printInConsole("    %-20s %-30s\n", "-x", _("Run in windowed mode"));
 	printInConsole("    %-20s %-30s\n", "--verbose", _("Enable verbose logging"));
 	printInConsole("    %-20s %-30s\n", "--spawn", _("Force spawn mode even if diabdat.mpq is found"));
-	printInConsole(_("\nHellfire options:\n"));
+	printInConsole("%s", _("\nHellfire options:\n"));
 	printInConsole("    %-20s %-30s\n", "--diablo", _("Force diablo mode even if hellfire.mpq is found"));
 	printInConsole("    %-20s %-30s\n", "--nestart", _("Use alternate nest palette"));
 #ifdef _DEBUG
@@ -188,7 +188,7 @@ extern void plrctrls_after_game_logic();
 	printInConsole("    %-20s %-30s\n", "-r <##########>", "Set map seed");
 	printInConsole("    %-20s %-30s\n", "-t <##>", "Set current quest level");
 #endif
-	printInConsole(_("\nReport bugs at https://github.com/diasurgical/devilutionX/\n"));
+	printInConsole("%s", _("\nReport bugs at https://github.com/diasurgical/devilutionX/\n"));
 	diablo_quit(0);
 }
 
diff --git a/Source/dvlnet/tcp_client.cpp b/Source/dvlnet/tcp_client.cpp
index d5b0fd6f0..b031a23ed 100644
--- a/Source/dvlnet/tcp_client.cpp
+++ b/Source/dvlnet/tcp_client.cpp
@@ -65,7 +65,7 @@ int tcp_client::join(std::string addrstr, std::string passwd)
 		}
 	}
 	if (plr_self == PLR_BROADCAST) {
-		SDL_SetError(_("Unable to connect"));
+		SDL_SetError("%s", _("Unable to connect"));
 		return -1;
 	}
 
diff --git a/Source/init.cpp b/Source/init.cpp
index 98254f849..f4ea29cd9 100644
--- a/Source/init.cpp
+++ b/Source/init.cpp
@@ -209,7 +209,7 @@ void init_archives()
 void init_create_window()
 {
 	if (!SpawnWindow(PROJECT_NAME))
-		app_fatal(_("Unable to create main window"));
+		app_fatal("%s", _("Unable to create main window"));
 	dx_init();
 	gbActive = true;
 #ifndef USE_SDL1
diff --git a/Source/loadsave.cpp b/Source/loadsave.cpp
index dc87f189e..4f84cdc25 100644
--- a/Source/loadsave.cpp
+++ b/Source/loadsave.cpp
@@ -994,10 +994,10 @@ void LoadGame(bool firstflag)
 
 	LoadHelper file("game");
 	if (!file.isValid())
-		app_fatal(_("Unable to open save file archive"));
+		app_fatal("%s", _("Unable to open save file archive"));
 
 	if (!IsHeaderValid(file.nextLE<uint32_t>()))
-		app_fatal(_("Invalid save file"));
+		app_fatal("%s", _("Invalid save file"));
 
 	if (gbIsHellfireSaveGame) {
 		giNumberOfLevels = 25;
@@ -1026,7 +1026,7 @@ void LoadGame(bool firstflag)
 	int _nobjects = file.nextBE<int32_t>();
 
 	if (!gbIsHellfire && currlevel > 17)
-		app_fatal(_("Player is on a Hellfire only level"));
+		app_fatal("%s", _("Player is on a Hellfire only level"));
 
 	for (uint8_t i = 0; i < giNumberOfLevels; i++) {
 		glSeedTbl[i] = file.nextBE<uint32_t>();
@@ -1783,7 +1783,7 @@ void SaveGameData()
 	else if (!gbIsSpawn && !gbIsHellfire)
 		file.writeLE<uint32_t>(LoadLE32("RETL"));
 	else
-		app_fatal(_("Invalid game state"));
+		app_fatal("%s", _("Invalid game state"));
 
 	if (gbIsHellfire) {
 		giNumberOfLevels = 25;
@@ -2021,7 +2021,7 @@ void LoadLevel()
 	GetPermLevelNames(szName);
 	LoadHelper file(szName);
 	if (!file.isValid())
-		app_fatal(_("Unable to open save file archive"));
+		app_fatal("%s", _("Unable to open save file archive"));
 
 	if (leveltype != DTYPE_TOWN) {
 		for (int j = 0; j < MAXDUNY; j++) {
diff --git a/Source/mainmenu.cpp b/Source/mainmenu.cpp
index 33b8a2cbd..4fab5ba98 100644
--- a/Source/mainmenu.cpp
+++ b/Source/mainmenu.cpp
@@ -120,7 +120,7 @@ void mainmenu_loop()
 	do {
 		menu = MAINMENU_NONE;
 		if (!UiMainMenuDialog(gszProductName, &menu, effects_play_sound, 30))
-			app_fatal(_("Unable to display mainmenu"));
+			app_fatal("%s", _("Unable to display mainmenu"));
 
 		switch (menu) {
 		case MAINMENU_NONE:
diff --git a/Source/msg.cpp b/Source/msg.cpp
index a7abeca0d..9ae0118e4 100644
--- a/Source/msg.cpp
+++ b/Source/msg.cpp
@@ -176,13 +176,13 @@ bool msg_wait_resync()
 	}
 
 	if (gbGameDestroyed) {
-		DrawDlg(_("The game ended"));
+		DrawDlg("%s", _("The game ended"));
 		msg_free_packets();
 		return false;
 	}
 
 	if (sgbDeltaChunks != MAX_CHUNKS) {
-		DrawDlg(_("Unable to get level data"));
+		DrawDlg("%s", _("Unable to get level data"));
 		msg_free_packets();
 		return false;
 	}
@@ -607,7 +607,7 @@ static void delta_put_item(TCmdPItem *pI, int x, int y, BYTE bLevel)
 		    && pD->dwSeed == pI->dwSeed) {
 			if (pD->bCmd == CMD_ACK_PLRINFO)
 				return;
-			app_fatal(_("Trying to drop a floor item?"));
+			app_fatal("%s", _("Trying to drop a floor item?"));
 		}
 	}
 
diff --git a/Source/pfile.cpp b/Source/pfile.cpp
index 47fbbe024..848dacedc 100644
--- a/Source/pfile.cpp
+++ b/Source/pfile.cpp
@@ -214,7 +214,7 @@ PFileScopedArchiveWriter::PFileScopedArchiveWriter(bool clear_tables)
     , clear_tables_(clear_tables)
 {
 	if (!pfile_open_archive(save_num_))
-		app_fatal(_("Failed to open player archive for writing."));
+		app_fatal("%s", _("Failed to open player archive for writing."));
 }
 
 PFileScopedArchiveWriter::~PFileScopedArchiveWriter()
@@ -388,9 +388,9 @@ void pfile_read_player_from_save(char name[16], int playerId)
 	save_num = pfile_get_save_num_from_name(name);
 	archive = pfile_open_save_archive(save_num);
 	if (archive == nullptr)
-		app_fatal(_("Unable to open archive"));
+		app_fatal("%s", _("Unable to open archive"));
 	if (!pfile_read_hero(archive, &pkplr))
-		app_fatal(_("Unable to load character"));
+		app_fatal("%s", _("Unable to load character"));
 
 	gbValidSaveFile = pfile_archive_contains_game(archive);
 	if (gbValidSaveFile)
@@ -413,7 +413,7 @@ bool LevelFileExists()
 
 	DWORD save_num = pfile_get_save_num_from_name(plr[myplr]._pName);
 	if (!pfile_open_archive(save_num))
-		app_fatal(_("Unable to read to save file archive"));
+		app_fatal("%s", _("Unable to read to save file archive"));
 
 	bool has_file = mpqapi_has_file(szName);
 	mpqapi_flush_and_close(true);
@@ -436,7 +436,7 @@ void GetPermLevelNames(char *szPerm)
 	save_num = pfile_get_save_num_from_name(plr[myplr]._pName);
 	GetTempLevelNames(szPerm);
 	if (!pfile_open_archive(save_num))
-		app_fatal(_("Unable to read to save file archive"));
+		app_fatal("%s", _("Unable to read to save file archive"));
 
 	has_file = mpqapi_has_file(szPerm);
 	mpqapi_flush_and_close(true);
@@ -455,7 +455,7 @@ void pfile_remove_temp_files()
 
 	DWORD save_num = pfile_get_save_num_from_name(plr[myplr]._pName);
 	if (!pfile_open_archive(save_num))
-		app_fatal(_("Unable to write to save file archive"));
+		app_fatal("%s", _("Unable to write to save file archive"));
 	mpqapi_remove_hash_entries(GetTempSaveNames);
 	mpqapi_flush_and_close(true);
 }
@@ -467,7 +467,7 @@ void pfile_write_save_file(const char *pszName, BYTE *pbData, DWORD dwLen, DWORD
 	save_num = pfile_get_save_num_from_name(plr[myplr]._pName);
 	codec_encode(pbData, dwLen, qwLen, pfile_get_password());
 	if (!pfile_open_archive(save_num))
-		app_fatal(_("Unable to write to save file archive"));
+		app_fatal("%s", _("Unable to write to save file archive"));
 	mpqapi_write_file(pszName, pbData, qwLen);
 	mpqapi_flush_and_close(true);
 }
diff --git a/Source/qol/monhealthbar.cpp b/Source/qol/monhealthbar.cpp
index ebcfe0729..bb2d29cce 100644
--- a/Source/qol/monhealthbar.cpp
+++ b/Source/qol/monhealthbar.cpp
@@ -32,7 +32,7 @@ void InitMonsterHealthBar()
 	if ((healthBox.surface == nullptr)
 	    || (health.surface == nullptr)
 	    || (resistance.surface == nullptr)) {
-		app_fatal(_("Failed to load UI resources. Is devilutionx.mpq accessible and up to date?"));
+		app_fatal("%s", _("Failed to load UI resources. Is devilutionx.mpq accessible and up to date?"));
 	}
 }
 
diff --git a/Source/qol/xpbar.cpp b/Source/qol/xpbar.cpp
index 15f072ddb..dd658b3bb 100644
--- a/Source/qol/xpbar.cpp
+++ b/Source/qol/xpbar.cpp
@@ -49,7 +49,7 @@ void InitXPBar()
 		LoadMaskedArt("data\\xpbar.pcx", &xpbarArt, 1, 1);
 
 		if (xpbarArt.surface == nullptr) {
-			app_fatal(_("Failed to load UI resources. Is devilutionx.mpq accessible and up to date?"));
+			app_fatal("%s", _("Failed to load UI resources. Is devilutionx.mpq accessible and up to date?"));
 		}
 	}
 }