@BenKenobi - I thought "thru" was the standard for "through" in the states. At least, it is at McDonalds.
There are many reasons as to why to languages are different. It all started in 1066, when William, Duke of Normandy (France) overthrew the current English king. This caused the English language to radically change, with many French influences (such as the "ough" in through, though, etc, and the extra u in colour).
What this lead to, over the years, was many different ways of producing the same sounds, and spelling the same words. It was one day decided that the English language should be standardised. The Americans, on the whole, use and teach a far more standardised version of English then they do in the UK and ROI, and this is what leads to all of these arguments on forums.
What people in the UK fail to realise, though, is that, over time, the English we use is also changing to the more standardised version. For example, how many of us UK lot spell "hiccough" the right way, and not "hiccup", and just last year I was told to stop spelling "sulphur", and to write "sulfur".







