What if English is not my native language — may I volunteer to read in English anyway? (Or, for English speakers: May I read in another language?)

Yes! Part of what makes listening to a LibriVox book so enjoyable is the wide variety of voices, dialects, and accents you’ll hear. You’re welcome to volunteer to read anything you feel comfortable with. Try children’s literature or short poetry if you’re hesitant about your skill in another language. Ask for help with pronunciation if you need it, but remember we’re not aiming for perfection.

http://librivox.org/wiki/moin.cgi/LanguagePolicy?highlight=%28accents%29