Regional Language Use
There are two generally accepted spelling systems for the English language. Our intelligent, international readers are accustomed to reading both.
Copy originating in the Americas should follow North American spelling conventions, such as color, defense, aging, caliber, etc. Copy originating elsewhere should follow British spelling norms.
These varieties will sometimes differ in vocabulary (soccer vs. football), and spelling (center vs. centre, color vs. colour).
For dates, currency, measurements, and other regional-specific considerations, read the relevant section of this guide.