code: def get_translation_in(self, key=None):
          
          if key is not None:
              return [
                  item
                  for item in self.texts.values()
                  if isinstance(item, CtsTranslationMetadata) and item.lang == key
                  ]
          else:
              return [
                  item
                  for item in self.texts.values()
                  if isinstance(item, CtsTranslationMetadata)
              ]
docs: Find a translation with given language
  
          :param key: Language to find
          :type key: text_type
          :rtype: [CtsTextMetadata]
          :returns: List of availables translations