Given the number of places around the world that English is spoken, differences are bound to emerge. Despite how much the USA and UK have in common, there are enough differences between their two versions of the English language that someone may not always understand exactly what someone from the other country is saying. Not only are there 160 distinct dialects of the English language, but there’s also different spelling and even words, used to describe one or other thing. Fortunately, the US State Department has created a series of these useful graphics to help clear things up between the British English Vs. American English usage.
Did you know, that the difference between spelling words like American color and British colour, or humor and humour, comes from the Brits adopting, their now called British words, from Old French language? When it came to America later, the spelling was simplified. And so is with many other American English and British English differences, as the adaptation of grammar took its part.