I don't think it'll slow things down; after all, programming doesn't normally load what it doesn't use. If you support seven hundred languages, only one will ever be used at a time. It will make the game more bulky to ship with all the translation text, but the game is so small as it is that I don't see it being an issue if they stick to the common languages. (English, German, French are most common, I seem to see, with Italian and Spanish running-up. I guess Italian and Spanish gamers aren't as numerous.)