Regular or irregular verbs?
This is a subtle difference that can be easily overlooked in speech, but is much more apparent in written form. Many verbs that are irregular in the past tense in Britain (leapt, dreamt, burnt, learnt) have been made regular in America (leaped, dreamed, burned, learned).
As the most-spoken second language on the planet, English has to be flexible. After all, it’s not solely spoken in the countries we’ve detailed above. So whether you speak English like a Brit or like an American, this shouldn’t be an obstacle when communicating with people on the opposite side of the pond, or anywhere else in the world.