Return a CountedVocabulary object.

  Args:
    lang (string): language code.
    type (string): wiki,...

def load_vocabulary(lang="en", type="wiki"):
  """Return a CountedVocabulary object.

  Args:
    lang (string): language code.
    type (string): wiki,...
  """
  src_dir = "{}_vocab".format(type)
  p = locate_resource(src_dir, lang)
  return CountedVocabulary.from_vocabfile(p)