I don’t think that swear words and swearing are part of some regional culture, I think they’re part of culture at a universal level. Or even multiversal if you’re into that…

And they are normalized, have been from the start. It’s the attempt at excluding them that’s been struggling on and off.

Hell, I still remember old ladies frightening children with priests cutting off their tongues for swearing, which is all kinds of fucked up in itself. But that was “normal” for them at the time.

I’d think that kind of behaviour would mess up communication styles more than someone using a vulgarity as an exclamation point.