docs: def get_translation_lookup(identifier, field, value):
      """
      Mapper that takes a language field, its value and returns the
      related lookup for Translation model.
      """
      # Split by transformers
      parts = field.split("__")
  
      # Store transformers
      transformers = parts[1:] if len(parts) > 1 else None
  
      # defaults to "title" and default language
      field_name = parts[0]
      language = get_fallback_language()
  
      name_parts = parts[0].split("_")
      if len(name_parts) > 1:
          supported_languages = get_supported_languages()
          last_part = name_parts[-1]
          if last_part in supported_languages:
              # title_with_underscore_fr?
              field_name = "_".join(name_parts[:-1])
              language = last_part
          else:
              # title_with_underscore?
              # Let's use default language
              field_name = "_".join(name_parts)
  
      value_lookup = (
          "field_value"
          if transformers is None
          else "field_value__%s" % "__".join(transformers)
      )
  
      lookup = {"field_name": field_name, "identifier": identifier, "language": language}
  
      lookup[value_lookup] = value
  
      return lookup