The arr-s are from the Cornish and their trade routes (including piracy), I believe.
Rural sounds were extinguished by state schools in the 1950s-60s. When I speak like certain relatives, apparently I sound like a pirate to Yanks. There is such a thing as posh rural too. Not just the Okay-yah lot. A softer level. But the Gap Yah lot do show the arr sound is classless English with a slight throat noise to seem almost like an Ah!
Really, it’s Arh!
Old English also sounded closer to Cornish/rural than modern TV “English” -RP.
I read in it once for a teacher, on an Old English text and my own friends had to look around because they didn’t know who was speaking. It sounds coarser but richer and more lyrical, the likes of Chaucer sound better.
Never try to read Old English in RP, it sounds horrendous. Tis a crime against ears.
Plenty of jokes also don’t work.
re RP: Why is it called Received?
Received upon sodomy at a boarding school. We jape.
Americans sound like they’re slurring because modern ones speak a lot slower (I can ‘get’ what they say at double speed, easily) and the vowels drag e.g.
English person would say:
Blunter, Celtic sound. Sounds clipped and mean, but isn’t.
Subtle but we like making people uncertain as to whether we love or loathe them.
We also have the BBC guide to defamation: