My children officially have southern accents. I had thought initially that they only spoke with accents as a goof, but slowly and steadily over the past year I’ve come to realize that no – they are pretty much just catching on to the accent.
My son doesn’t say “again,” he says, “uh-gay-un.” And he doesn’t do it as a joke.
That’s just one example. But they both regularly speak with an accent now, despite the fact that Denis and I don’t have a southern accent at all.