I'm not sure that Geordie counts as actual English, given that 80% of England (never mind the rest of the Anglosphere) can't understand it ;)

I once worked as a KP in the Isle of Man alongside cooks from Belfast, Glasgow and Sunderland. My Wurzel upbringing did not prepare me for this. Took me 3 weeks of repeated "what?" to begin to understand them. But I find that 30 years later, I can still understand them. Weird how that works.