Sorry... This might be dead now, but us English sorts are nothing but polite. Yes, we do indeed switch. I’ve never seen ‘offencive’ used past archaic English. Shakespeare might have used it but it’s certainly not in modern use. I appreciate your interest, sir.

Advice/advise = licence/license

Um... Can’t tell if joking. If not, that’s offensive. As a Brit, I take offence.