As a Brit who has lived in the US for a couple of years on and off it gets very confusing. I can never remember which spelling is correct for the current situa

As a Brit who has lived in the US for a couple of years on and off it gets very confusing. I can never remember which spelling is correct for the current situation for some terms: centre/center, tire/tyre, singular or plural collective nouns, etc. I know there are two variants, I just can't remember which one is the US one and which is the UK one; stuff like colour/color is easy, as is when to use sneakers/trainers (only made that mistake once) but some words play tricks on me.