I remember coming back to NI from England 30 years ago and ONCE saying that something dropped out-of-doors was on “the floor” rather than “the ground” and I am still mortified every time I think about it---
Mother in law hung up on Prince Lumpy because he said small instead of wee. She also went mental when he said sandwich instead of piece.
Even English people resident here using the local vernacular go down like chewing tinfoil with a mouthful of fillings let alone some Essex Estuary nob co-opting it because her ma lived here 50 years ago