class_docstr: A language model on untokenized Wikipedia, 4 languages together.
class_docstr_tok: ["A","language","model","on","untokenized","Wikipedia",",","4","languages","together","."]
code: def approx_vocab_size(self):
      return 64000
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import six
  from tensor2tensor.data_generators import generator_utils
  from tensor2tensor.data_generators import problem
  from tensor2tensor.data_generators import text_problems
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the LanguagemodelDeEnFrRoWiki64k obj's underlying member method code with example usage: obj.approx_vocab_size() and returns: int