docs: def _get_language_description(self, language_code):
          """
          Returns the description of language.
  
          :param language_code: The BCP 47 code language.
          :type language_code: str
          :return: The description of language.
          :rtype: str
          """
  
          language = language_code.lower()
          parameter = 'language-' + language
          if self.configure.has_parameter(parameter):
              return self.configure.get_parameter(parameter)
          elif '-' in language:
              codes = re.split(r'\-', language)
              parameter = 'language-' + codes[0]
              if self.configure.has_parameter(parameter):
                  return self.configure.get_parameter(parameter)
          return None