Hey, Captcha sometimes appears to user and it can be very difficult to guess.
Some letters are very hard to read, so I sometimes can't recognize them. But when in captcha is word I know I can guess it easier. Sometimes I have to change captcha many times to find some word I know. Many of them are difficult and not IT technical.
Couldn't the capcha be more binded with user language? F.g. in German or Russian? Stackoverflow wouldn't be then so closed for people that speak no very good English, only the technical one. And it does not make them technical weaker.