Correct, and we also spell things with an s where you use a z and others such as we spell "color" as "colour". The problem is, if I were to correct it for the U

Correct, and we also spell things with an s where you use a z and others such as we spell "color" as "colour". The problem is, if I were to correct it for the UK, the US complain, if I correct it for the US, the UK complain. Since I am from the UK I will definitely make US related mistakes because I have not learnt your English.