User blog comment:Chicken Bond/Minor Policy Changes/Alterations!/@comment-5028662-20130106142931/@comment-453181-20130107074501

Since the MoS was written long ago by Slice, I really don't know how it's supposed to be different from English. Basically, what it's supposed to mean is speak English, use grammar as you would in English, etc. Don't use other languages, unless a character is speaking another language, in which case their speaking of another language should be described and not written, or a translation provided. This is to avoid confusing users who are reading the story. But otherwise, basically, it means "use proper English". "American English' is just the term I think Slice wrote when he meant "proper English".