Websites that choose display language based on IP address is the bane of my existence and google is the absolute worst site for doing this. I used to use ncr constantly for any google related task. I don't trust google enough any more to log in and set language preferences - I only allow their web properties to store session cookies when needed. The best I can do with google is to write a dumb greasemonkey script to add 'hl=en' to any google URLs.