multi-lingual smartlist?

Are there plans (or existing hacks) to allow SmartList to be multi-lingual in its messages (e.g. the feedback sent by rc.submit with "subscribe", "unsubscribe", "help", etc.)? I currently have lists in German, Spanish, Danish, and English, so it would be convenient to have, for example, a "locale" parameter in rc.custom. Cheers, Seth Chaiklin