Then perhaps the way to do it is through the discussion of words. US/UK differences I've noticed:

Cookie/Biscuit
Cookie/Cookie
Biscuit/Bun
Bacon/Pork Scratchings (joking - but it seems that way)
Canadian Bacon/Bacon
Butter/Unsalted butter
Cheese/Goo
What?/Cheese
Sandwich/"What do you mean no butter?"
Pop/Soft drink
Soda/Soft drink
Club soda/Soda
Rum/White Rum
Poison/Salt

etc

cheer

the sunshine warrior