Google - manually changing search language

Google use some fancy IP - based tools to present you with a local language interface.

But what if say you are visiting another country and you still want your own language? What you do is start with a different URL:

http://www.google.com/webhp?hl=en

searching on say Zurich gives you
while

http://www.google.com/webhp?hl=de (German)

gives you
Nice!