code: func MustTfuncAndLanguage(languageSource string, languageSources ...string) (TranslateFunc, *language.Language) {
  	tfunc, lang := defaultBundle.MustTfuncAndLanguage(languageSource, languageSources...)
  	return TranslateFunc(tfunc), lang
  }
docs: // MustTfuncAndLanguage is similar to TfuncAndLanguage except it panics if an error happens.