code: def set_cache(
          self,
          instance=None,
          translation=None,
          language=None,
          field_name=None,
          field_value=None,
      ):
          
          if instance is not None and translation is not None:
              cached_obj = CachedTranslation.from_object(translation)
              instance._linguist_translations[translation.field_name][
                  translation.language
              ] = cached_obj
              return cached_obj
  
          if instance is None:
              instance = self.instance
  
          cached_obj = self.get_cache(
              instance,
              translation=translation,
              field_value=field_value,
              language=language,
              field_name=field_name,
          )
  
          if field_value is None and cached_obj.field_value:
              cached_obj.deleted = True
  
          if field_value != cached_obj.field_value:
              cached_obj.has_changed = True
              cached_obj.field_value = field_value
  
          return cached_obj
docs: Add a new translation into the cache.