feat: enhance game language support in settings

- Added documentation for mapping system CultureInfo names to Minecraft game language codes.
- Included support for Tagalog (tl and tl-PH) language codes in the game settings.

MinecraftClient/Settings.cs

@@ -1838,6 +1838,15 @@ namespace MinecraftClient
             }
         }
 
+        /// <summary>
+        /// Map the system CultureInfo name to a Minecraft game language code.
+        /// </summary>
+        /// <remarks>
+        /// Culture name reference (language-COUNTRY):
+        ///   https://learn.microsoft.com/en-us/previous-versions/commerce-server/ee797784(v=cs.20)
+        /// Full LCID / language-tag spec (MS-LCID, includes fil-PH, nb-NO, etc.):
+        ///   https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-lcid/70feba9f-294e-491e-b6eb-56532684c37f
+        /// </remarks>
         public static string GetDefaultGameLanguage()
         {
             string gameLanguage = "en_us";
@@ -1997,6 +2006,10 @@ namespace MinecraftClient
                 case "fil-PH":
                     gameLanguage = "fil_ph";
                     break;
+                case "tl":
+                case "tl-PH":
+                    gameLanguage = "tl_ph";
+                    break;
                 case "fo":
                 case "fo-FO":
                     gameLanguage = "fo_fo";