nltk_data/stemmers/snowball_data.xml

<package id='snowball_data' 
         name='Snowball Data'
         languages="Danish, Dutch, English, Finnish, French, German,
         Hungarian, Italian, Norwegian, Portuguese, Romanian, Russian,
         Spanish, Swedish, Turkish"
         webpage="https://github.com/snowballstem/snowball-data"
         unzip="0"
         />