English is not my first  language and I had a terrible time with spelling at school learning it as a forein language . I lived  a lot of years in the US and in the UK,so it was very liberating to find out about the different versions of spellings. Now I just spell things as I like - surely  it will be right in some version or other... (Or is it that I am always wrong in one version or other?)
My daughter(raised in the UK) spent a term in a US university and was always asked to "say something English"  and she would teach them how to say various rude words in a "proper"  English pronounciation...
In addition to spelling there is also the confusion of different words for the same thing,and same words for different things.Like - torch/flashlight; bonnet/hood;pavement/sidewalk; elevetor/lift; flat/appartment etc. The funniest is trousers/pants - americans use pants for an outer garment,but in england that's the word for underware!

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