code: def test_language():
      assert DOC_1.language == "en"
      assert DOC_2.language == "nl"
      assert DOC_3.language == "un"
  
imports: import re
  from unittest import mock
  import pytest
  import spacy
  import numpy
  from fakeredis import FakeRedis
  from textpipe.doc import Doc, TextpipeMissingModelException, RedisIDFWeightingMismatchException
  from textpipe.wrappers import RedisKeyedVectors
label_desc: Use image node_id 7 for calling a global function with example usage: test_language() without return types