Internal Program Version: snowballstemmer  2.2.0

This package provides 16 stemmer algorithms (15 + Poerter English
stemmer) generated from Snowball algorithms.  It includes following
language algorithms: Danish, Dutch, English (Standard, Porter),
Finnish, French, German, Hungarian, Italian, Norwegian, Portuguese,
Romanian, Russian, Spanish, Swedish, Turkish. This is a pure Python
stemming library. If PyStemmer is available, this module uses it to
accelerate.

https://github.com/shibukawa/snowball_py