Windows Languages

[redder]

This will probably be a stupid post, I don't know you guys tell me if I'm wrong but, having tried Windows XP Home and Pro and Windows 2000 Pro in both Portuguese and english (US) versions, plus Windows 95/98/ME in both my native language (portuguese) and the international english(US) versions, I noticed one common diference in all of them, no matter what windows OS you are running, it won't be as fast as the international english (US) version! Why? I have no idea, do you guys notice the same diference?