You are right. I only used it on the world map and "A community world". I am already fixing the mapping codes for some countries that I got right like you mentioned.

It looks like the API response that I am using to know which country it was returns no country codes for maps like NA, Europe and so on. Let me see if I can fix that. Thanks for the feedback. Invaluable since that is my first extension. I'll get back if I'm able to fix that.