Earlier quoted context omitted.
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.
Not only did Australians invent it, we also invented Pavlova, Sam Neill, etc.
(Conversely, I've seen Australians who dislike Halloween because they think it's an American invention, but it's also Scottish.)