code: func TfuncAndLanguage(languageSource string, languageSources ...string) (TranslateFunc, *language.Language, error) {
  	tfunc, lang, err := defaultBundle.TfuncAndLanguage(languageSource, languageSources...)
  	return TranslateFunc(tfunc), lang, err
  }
docs: // TfuncAndLanguage is similar to Tfunc except it also returns the language which TranslateFunc is bound to.