code: def _get_cached_values(instance, translated_model, language_code, use_fallback=False):
      
      if not appsettings.PARLER_ENABLE_CACHING or not instance.pk or instance._state.adding:
          return None
  
      key = get_translation_cache_key(translated_model, instance.pk, language_code)
      values = cache.get(key)
      if not values:
          return None
  
      # Check for a stored fallback marker
      if values.get('__FALLBACK__', False):
          # Internal trick, already set the fallback marker, so no query will be performed.
          instance._translations_cache[translated_model][language_code] = MISSING
  
          # Allow to return the fallback language instead.
          if use_fallback:
              lang_dict = get_language_settings(language_code)
              # iterate over list of fallback languages, which should be already
              # in proper order
              for fallback_lang in lang_dict['fallbacks']:
                  if fallback_lang != language_code:
                      return _get_cached_values(
                          instance, translated_model, fallback_lang,
                          use_fallback=False
                      )
          return None
  
      values['master'] = instance
      values['language_code'] = language_code
      return values
docs: Fetch an cached field.