I'd suppose it's no different than the wide use of local colloquialisms, abbreviations, and pronunciation differences in spoken language region by region. An Am

I'd suppose it's no different than the wide use of local colloquialisms, abbreviations, and pronunciation differences in spoken language region by region. An American in Australia has to intuitively pick up a lot of new vocabulary in order to understand what's going on in addition to the obvious parsing of the accent.