FWIW, I didn't mean that if the author doesn't swear, they can't write a character who does. You just have to be careful about how you write it, so as not to call attention to your avoidance. I would have no problem with occasional mentions of swearing without the actual words. If the swearing character is using tame language without explanation for why they're currently toning it down, however, it calls attention to the avoidance,