The word period for full stop is startling to me as in the UK this means a menstrual period which were always kept completely secret and undiscussed in my day. So when someone says '...blah blah blah. PERIOD' it's like someone ran into the room and shouted something rude very loudly!

I'm not sure I believe the Queen would use the c-word - in my experience it's still the one that would cause genuine shock - I have never used it out loud. Hundreds of years ago the equivalent word was quim so some Brits were rather startled by Loki and his mewling quim comment because he was in effect calling her a 'whining c***'!

There is a British novel by Patrick Hamilton set in Victorian London called 'Fanny by Gaslight' which always amuses me.