Fix locale conversion

SpigotCore_12/src/de/steamwar/core/WorldOfColorWrapper12.java

@@ -27,6 +27,6 @@ public class WorldOfColorWrapper12 implements WorldOfColorWrapper.IWorldOfColorW
 
     @Override
     public Locale getLocale(Player player){
-        return Locale.forLanguageTag(player.getLocale());
+        return Locale.forLanguageTag(player.getLocale().replace('_', '-'));
     }
 }

SpigotCore_8/src/de/steamwar/core/WorldOfColorWrapper8.java

@@ -27,6 +27,6 @@ public class WorldOfColorWrapper8 implements WorldOfColorWrapper.IWorldOfColorWr
 
     @Override
     public Locale getLocale(Player player){
-        return Locale.forLanguageTag(player.spigot().getLocale());
+        return Locale.forLanguageTag(player.spigot().getLocale().replace('_', '-'));
     }
 }