code: def languages(self, key, value):
      
      languages = self.get('languages', [])
  
      values = force_list(value.get('a'))
      for value in values:
          for language in RE_LANGUAGE.split(value):
              try:
                  name = language.strip().capitalize()
                  languages.append(pycountry.languages.get(name=name).alpha_2)
              except KeyError:
                  pass
  
      return languages
docs: Populate the ``languages`` key.