Slowpitch, Slopitch, and Softball

The variation between Slowpitch and Slopitch seems to be a regional thing. Slowpitch is used by American's and Slopitch is used by Canadians. Softball seems to be just confusing since it's used more for college or women's ball.

What do you call it and what's your region? I am looking to SEO and trying to determine the best term to describe this beloved activity.