Adding query player language (#824)

src/main/java/carpet/fakes/ClientSettingsC2SPacketInterface.java

@@ -0,0 +1,5 @@
+package carpet.fakes;
+
+public interface ClientSettingsC2SPacketInterface {
+    public String getLanguage();
+}

src/main/java/carpet/fakes/ServerPlayerEntityInterface.java

@@ -7,5 +7,5 @@ public interface ServerPlayerEntityInterface
     EntityPlayerActionPack getActionPack();
     void invalidateEntityObjectReference();
     boolean isInvalidEntityObject();
-
+    String getLanguage();
 }