Comment 3 for bug 1643998

Since the documentation in the referenced page says it is a table of currently-supported languages, I'm +1 to adding the supported languages cited by Ben, holding off on Arabic until will get the l-to-r styles in the core code.

I think potential adopters and current Evergreen cites are likely to ask the question of what languages are available, and it's nice to have them listed in an easily-accessible place.