The problem when writing for both audiences, however, is that you have to adapt. Here is a quick tip on how to switch between American and British Spell-Check in Word.
For example, in British English, behavior is spelled with a “u” while in American English, it is spelled as “behavior.” The same goes for “color” in American English, and “colour” in British English and many other words. So as a writer who may be writing for American and British audience groups, it’s best to know which spelling to use. The spellings are strikingly different between the two. American English is so much different from British English.