If you do not know about Kachru’s Three Circle Model then go read up on it because it is, like, Darwin’s Origin of Species for World-English nerds.
Here are my pages for the inner circle Englishes. New Zealand and Canada are of course still to come.
Local variants
Heddwen Newton is an English teacher and translator. She is fascinated by contemporary English and the way English changes. Her newsletter is English in Progress. 1900 subscribers and growing every day!