I'm starting to experiment with the tools more and more myself. Actually, I signed up for Grammarly and I think they let me set it to Canadian English.

Color is underlined red, so is realised and theater. Perfect as they should be. I noticed UK and US. Not sure what spelling SA uses, but Canada is a mix of British and US...just tested it's good. But yeah, I hate how it ignores license. It still reminds me to double-check and sometimes it does catch things I shouldn't use my license for.