def set_lang(prefix):
  '''
  Change the language of the API being requested.
  Set `prefix` to one of the two letter prefixes found on the `list of all Wikipedias <http://meta.wikimedia.org/wiki/List_of_Wikipedias>`_.

  After setting the language, the cache for ``search``, ``suggest``, and ``summary`` will be cleared.

  .. note:: Make sure you search for page titles in the language that you have set.
  '''
  global API_URL
  API_URL = 'http://' + prefix.lower() + '.wikipedia.org/w/api.php'

  for cached_func in (search, suggest, summary):
    cached_func.clear_cache()
Change the language of the API being requested.
  Set `prefix` to one of the two letter prefixes found on the `list of all Wikipedias <http://meta.wikimedia.org/wiki/List_of_Wikipedias>`_.

  After setting the language, the cache for ``search``, ``suggest``, and ``summary`` will be cleared.

  .. note:: Make sure you search for page titles in the language that you have set.