Add optional native and additional language fields to user profiles #238

To make communication via private messages (PMs) or comments easier, it might be a good idea to allow users to specify their native language—on a strictly voluntary, optional basis—in their profile ("About" section), along with up to two additional languages they are proficient in speaking and writing.

It has happened more than once that two "Dreamers" have been exchanging messages in English, only to discover later that they actually share the same native language. This would also help Dreamers who are not very comfortable—or not at all comfortable—with speaking or writing in English to connect, comment, or send messages; they would be able to see at a glance which languages the other person understands—perhaps even their own native language.