feat(i18n): add Mongolian translation

installer/macos/Info.plist

@@ -3,7 +3,7 @@
 <plist version="1.0">
 <dict>
     <key>CFBundleDevelopmentRegion</key><string>en</string>
-    <key>CFBundleLocalizations</key><array><string>en</string><string>ko</string><string>zh-Hans</string><string>zh-Hant</string><string>pt-PT</string><string>pt-BR</string><string>de</string><string>it</string><string>id</string><string>vi</string><string>fa</string></array>
+    <key>CFBundleLocalizations</key><array><string>en</string><string>mn</string><string>ko</string><string>zh-Hans</string><string>zh-Hant</string><string>pt-PT</string><string>pt-BR</string><string>de</string><string>it</string><string>id</string><string>vi</string><string>fa</string></array>
     <key>CFBundleIdentifier</key><string>com.filee.app</string>
     <key>CFBundleName</key><string>Filee</string>
     <key>CFBundleDisplayName</key><string>Filee</string>

installer/macos/mn.lproj/InfoPlist.strings

@@ -0,0 +1,2 @@
+"NSAppleEventsUsageDescription" = "Filee хөрвүүлэх товчлол ашиглах үед Finder-д сонгосон файлуудыг уншина.";
+"NSInputMonitoringUsageDescription" = "Filee хөрвүүлэх цэсийг харуулахын тулд товчлол болон чирэх үйлдлийг танина.";

installer/macos/mn.lproj/ServicesMenu.strings

@@ -0,0 +1 @@
+"Convert with Filee" = "Filee-ээр хөрвүүлэх";

src/Filee.App/Services/AppLanguages.cs

@@ -30,6 +30,7 @@ internal static class AppLanguages
         ("id", "Bahasa Indonesia"),
         ("vi", "Tiếng Việt"),
         ("bn-BD", "বাংলা (বাংলাদেশ)"),
+        ("mn", "Монгол"),
     ];
 
     /// <summary>Shared Portuguese region policy for the app and Setup, including legacy Inno language codes.</summary>

src/Filee.App/Services/LocalizationService.cs

@@ -108,6 +108,11 @@ internal static string Resolve(string setting, Func<string> osLanguage)
             return Languages.First(l => l.Code.Equals(setting, StringComparison.OrdinalIgnoreCase)).Code;
 
         var ui = osLanguage();
+        // Mongolian in Cyrillic ("mn", "mn-MN", "mn-Cyrl"); the traditional script ("mn-Mong", Inner Mongolia) reads
+        // differently, so it keeps the fallback.
+        if (ui.Equals("mn", StringComparison.OrdinalIgnoreCase)
+            || ui.StartsWith("mn-", StringComparison.OrdinalIgnoreCase) && !ui.Contains("Mong", StringComparison.OrdinalIgnoreCase))
+            return "mn";
         if (ui.Equals("de", StringComparison.OrdinalIgnoreCase) || ui.StartsWith("de-", StringComparison.OrdinalIgnoreCase))
             return "de";
         // "it" and every region ("it-IT", "it-CH", …), but not Itelmen "itl".

src/Filee.Setup/SetupOptions.cs

@@ -10,7 +10,7 @@
 //   /NOCLOSEAPPLICATIONS    don't force-close programs that still run from the install folder after "Filee --quit"
 //   /DIR="folder"           install folder (environment variables are expanded)
 //   /LANG=ko                language of Setup (and of a newly installed Filee): en, es, ja, ko, zh-CN (Inno: zhcn),
-//                           zh-TW, pl, hi, ru, ar, pt-PT, pt-BR, fr, ne, th, tr, de, it, id, vi, fa, bn-BD
+//                           zh-TW, pl, hi, ru, ar, pt-PT, pt-BR, fr, ne, th, tr, de, it, id, vi, fa, bn-BD, mn
 //   /TASKS="a,b"            exactly these options; /MERGETASKS="a,!b" changes the defaults. "!" unticks, "*" ticks
 //                           the children too. Names: contextmenu, contextmenu\top, startup, cli, desktopicon
 //   /NOICONS                no Start menu and desktop shortcuts

tests/Filee.App.Tests/LocalizationTests.cs

@@ -212,6 +212,11 @@ public void Russian_is_offered_under_its_own_name()
     [InlineData("zh-Hant-HK", "zh-TW")]
     [InlineData("zh-MO", "zh-TW")]
     [InlineData("fr-FR", "fr")]
+    [InlineData("mn", "mn")]
+    [InlineData("mn-MN", "mn")]
+    [InlineData("mn-Cyrl-MN", "mn")]
+    [InlineData("mn-Mong-CN", "en")] // the traditional script isn't this Cyrillic translation
+    [InlineData("mni", "en")]
     [InlineData("fr-CA", "fr")]
     [InlineData("frr-DE", "en")]
     [InlineData("ne-NP", "ne")]

tests/Filee.Setup.Tests/SetupTextsTests.cs

@@ -38,6 +38,9 @@ public void Setup_offers_every_language_filee_has()
 
     [Theory]
     [InlineData("tr", "en-US", "tr")]
+    [InlineData("mn", "en-US", "mn")]
+    [InlineData("auto", "mn-MN", "mn")]
+    [InlineData(null, "mni", "en")]
     [InlineData("TR", "en-US", "tr")]
     [InlineData("auto", "tr-TR", "tr")]
     [InlineData(null, "tr-CY", "tr")]