I don't have much of a problem with language either, so long as it's not used unnecessarily, which is hard to tell with this show since they've made it clear they're intentionally making the show "more adult." As people have already mentioned, when used in songs, that's not really a problem since family-friendly shows and movies have used songs with language in them anyway, but if the characters are using language for the sake of using language, then that would be unnecessary.