If you were with me over breaks during #SotB2025 and I was trying to remember an old comedian who talked funny, turns out it was Professor Stanley Unwin, who spoke his own special "Unwinese":

https://youtu.be/85jRiZ6xNAU
http://www.stanleyunwin.com/unwinese.htm

I think he's just fallen out of the collective British memory - he spoke in a jolly and silly sort of way which sounded like it should be fully understandable, but wasn't.

Or, sometimes it was complete nonsense but you knew exactly what he meant!