Additional stopword lists

Are you aware of the [stopwords-json](https://github.com/6/stopwords-json) project which already has freely-licensed json-format lists of stopwords for 50 different languages? Importing these would be an easy way to expand the list of languages supported here without recreating the lists for each language from scratch.

I have also created some scripts to manage stoplist creation as part of the [more-stoplists](https://github.com/dohliam/more-stoplists/tree/master/scripts) project (which has now been merged into stoplists-json). Some of these may be useful for your work. In addition there is a [stopword-trainer](https://github.com/eklem/stopword-trainer) by Espen Klem that can create stoplists based on a set of documents.

Other stopword projects / sources of freely-licensed stopwords that you might want to check out if you haven't already:

* https://github.com/6/stopwords-json
* https://github.com/fergiemcdowall/stopword
* https://github.com/stopwords-iso