code: def ssml_lang(self, words, xml_lang=None, **kwargs):
          
          return self.nest(SsmlLang(words, xml_lang=xml_lang, **kwargs))
docs: Create a <Lang> element
  
          :param words: Words to speak
          :param xml:lang: Specify the language
          :param kwargs: additional attributes
  
          :returns: <Lang> element