Bug#578840: website browsing language selection should act like Google, Youtube
Regarding http://www.debian.org/intro/cn.en.html#fix ,
why don't you just have a cookie that is sent when one clicks
"This page is also available in the following languages",
and use that later, like Youtube, Google, etc. do.
That way the user needs not to muck with the browser.
I believe that your current suggestion assumes the user wants to read every website in a certain language,
not just the Debian web site.
Of course my suggestion assumes the user want to read every PAGE on the Debian website in a certain language.