diff --git a/source/Reloaded.Mod.Launcher/App.xaml.cs b/source/Reloaded.Mod.Launcher/App.xaml.cs
index f4b11a06..483eb990 100644
--- a/source/Reloaded.Mod.Launcher/App.xaml.cs
+++ b/source/Reloaded.Mod.Launcher/App.xaml.cs
@@ -50,8 +50,18 @@ private void SetupResources()
         var themeSelector    = new XamlFileSelector($"{launcherFolder}\\Theme");
         
         var conf = Lib.IoC.GetConstant<LoaderConfig>();
+        if (conf.FirstLaunch)
+        {
+            // Default the language to user's system language.
+            // e.g. en-GB.xaml
+            var currentCulture = Thread.CurrentThread.CurrentUICulture + ".xaml";
+            conf.LanguageFile = languageSelector.Files.FirstOrDefault(x => Path.GetFileName(x) == currentCulture) ?? conf.LanguageFile; 
+        }
+        
         themeSelector.SelectXamlFileByName(Path.GetFileName(conf.ThemeFile));
         languageSelector.SelectXamlFileByName(Path.GetFileName(conf.LanguageFile));
+        
+        
         LibraryBindings.Init(languageSelector, themeSelector);
 
         // Ideally this should be in Setup, however the download dialogs should be localized.