def only_language(self, language=short_language_code):
        """
        Only return objects which have a translation into the given language.

        Uses the currently active language by default.
        """

        return self.filter(
            translations__language_code=(language() if callable(language) else language)
        )

        Only return objects which have a translation into the given language.

        Uses the currently active language by default.
        
feincms/translations.py