We recently had an email from a user saying that our site was great but there was one small error, "The grey balloon was shown but the spelling was spelled as “gray” instead of grey (the correct spelling)". It seems to be a bit of a grey/gray area.
This is an interesting point. We are British and American educators based in Taiwan. Due to the fact that we are based in Taiwan we have chosen to use the US spelling, most of the time.
In our material we use 'color' and not 'colour'. This is the American spelling.
We also use 'dialogue' and not 'dialog'. This however, is the British spelling.
So as you can see, we are consistent with our inconsistencies. But jokes aside, English is becoming more and more globalised/globalized. Spoken as a first language by over 300 million people around the world, English is shifting and changing all the time. So most essentially, is it a doughnut or a donut? These questions and more will satisfy our mental hunger for years to come. What is most important perhaps is the awareness of the differences. I mean some people spell 'Pumkin', 'pumpkin'!!
I found this great test about the differences between the two.
Here is a great blog post about the different types of English.
There is a good guide here for the differences between British and American English.
Thanks to http://youronlinenglishclass.com