I’ve created the English captions file: http://keithcu.com/MoviePublic/SWCaptions.srt .
If you’d like to translate or review it in your language, please put your email address in this Google form:
https://docs.google.com/spreadsheets/d/1ng7PgN-n-fUKNpnHoOPh7oRyN5qQatm98G_36faXRug/edit#gid=0
There are online tools for distributed translation like Pootle, or I could put it in Git and let people work on portions, if translating the whole file is too big for one person.