Of course, Terisa, I don't know all the drawbacks or how to code it or even if it is worth the effort. And of course maybe (possibly) it's a complete crazy idea... As I said, I just wanted to start a brainstorm, nothing more nothing less.
Nevertheless I've just solved the yes/no issue. It was reaaaaaally easy.
Now all my calculated yes/no columns support GUI language changes!!!
Follow the link to launchpad in my first post to get the solution...