I like Briticism, save for... “whilst”. It’s like fingernails on the proverbial blackboard. I think it’s because a Canadian division of my company had a particularly annoying British transplant manager who sprinkled that word in his conversation.
It always seems to be embedded in a long dry pedantic and condescending monologue.
Yikes, I’m picturing Joan Rivers doing Queen Elizabeth “fuh fuhf uhhf fuh.” Or John Cleese doing the real thing with real words. Whilst whistling.