def get_fallback_languages(self, language_code=None, site_id=None):
        choices = self.get_active_choices(language_code, site_id=site_id)
        return choices[1:]
Find out what the fallback language is for a given language choice.
dataset/ETHPy150Open edoburu/django-parler/parler/utils/conf.py/LanguagesSetting.get_fallback_languages