Translator fallBackTranslator) {
    super(wControl);
    this.locale = ureq.getLocale();
    this.identity = ureq.getIdentity();
    if (fallBackTranslator == null) {
      throw new AssertException(
          "please provide a fall translator if using this constructor!!");
    }
    this.fallbackTranslator = fallBackTranslator;
    this.translator = Util.createPackageTranslator(this.getClass(), locale,
        fallBackTranslator);