Does anyone actually speak latin any more?
as in, actually uses it to converse.
And also, without wanting to suggest that welsh isn't necessary, is there anyone that only speaks welsh? as in, doesn't speak english as well.
Little known fact: the rarest language in the world is some south american one, and it is only spoken by two people in the entire world. Unfortunately though, however, they fell out with each other a long time ago, so it never gets spoken.