Save translation data into translation objects.

def save_translations(self, instance, translated_data):
        """
        Save translation data into translation objects.
        """
        for meta in self.Meta.model._parler_meta:
            translations = translated_data.get(meta.rel_name, {})
            for lang_code, model_fields in translations.items():
                translation = instance._get_translated_model(lang_code, auto_create=True, meta=meta)
                for field, value in model_fields.items():
                    setattr(translation, field, value)

        # Go through the same hooks as the regular model,
        # instead of calling translation.save() directly.
        instance.save_translations()