I spent a bunch of time in the UK before moving to the US, I adapted fairly quickly to the American way of pronouncing and the different words, but there are still a few British words that I like to use to my friends amusement. Especially if I’m tired, stressed or spaced out, I automatically go back to default. Plus there is a few British words that I like better, so I keep on using them.
dialling tone — dial tone
hundreds and thousands — sprinkles
ladybird — ladybug
lift — elevator
lollipop — Popsicle
mum — mom
petrol — gas
queue — line
trainers — sneakers
I dont know how many times a day I have to correct myself from writing Colour instead of Color.