update english to 10 ** 66 - 1
add random test for english
Merge branch 'feature/add_random_test_for_english' into develop

* feature/add_random_test_for_english:
  add random test for english
  update english to 10 ** 66 - 1
version update
Merge branch 'release/0.2.6' into develop

* release/0.2.6:
  version update