Convert to the superior language system. (pt. 2)

src/main/java/emu/grasscutter/command/commands/SetFetterLevelCommand.java

@@ -18,7 +18,7 @@ public final class SetFetterLevelCommand implements CommandHandler {
     @Override
     public void execute(Player sender, Player targetPlayer, List<String> args) {
         if (targetPlayer == null) {
-            CommandHandler.sendMessage(sender, Grasscutter.getLanguage().Target_needed);
+            CommandHandler.sendMessage(sender, translate("commands.execution.need_target"));
             return;
         }