Define "profanity." I imagine a religious institution's definition may vary from others.
Come to think of it, define "teen novel." As others have already said, there's no rating system for books. Most libraries have a tiny, token "young adult" section, but from what I remember those books are absolute tripe, usually revolving around some current "issue" that's meant to be relevant to young people (chat rooms, for example) and written by someone who clearly has a very limited understanding of actual young adults. Also, as I recall, they desperately skirted around the issue of swearing, resulting in some incredibly unconvincing teen dialogue. I skipped straight from children's books to adult ones, as did most people I know.