I think you can cancel out from an action with the right button on the mouse.
The decision to not have subtitles is such a dumb thing to do. Sometime I waffle back and forth on whether I use them or not, but anybody with serious hearing problems would absolutely need them and, like you said, some of the accents are a little weird so some things are just simply hard to understand anyway. Maybe that's something they'll get a patch on soon, though.