2012/7/26 Platonides Platonides@gmail.com:
Thet don't need to read English. They just need to type the letters they see on the image. Sure, you can have a small advantage if you know what letters could make a valid English word (or if you have the captcha dictionary installed), but a Brazilian which can read wikipedia should have no problems typing the captcha.
If that is the case, why don't we change the CAPTCH for random letters?