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.
Not only did Australians invent it, we also invented Pavlova, Sam Neill, etc.