One thing I remember from languagelog is that almost all English speakers have a form of "yeah no" and they all think they invented it.
https://languagelog.ldc.upenn.edu/nll/?p=30758
Might be Scottish.
https://languagelog.ldc.upenn.edu/nll/?p=30758
Might be Scottish.
(Conversely, I've seen Australians who dislike Halloween because they think it's an American invention, but it's also Scottish.)