2009 Dec 4, 10:24
Flickr dev. blog on the accept-language HTTP header: "It’s true that the Accept-Language header has a troubled history. Because of this, many developers regard it the way medieval villagers might
have regarded a woman with a warty nose and a pet cat – it should be shunned, avoided and possibly burned at the stake." And this great anecdote: "In two and a half years of running as an
international site, we’ve only ever had one case where it didn’t work. Helio, a cellphone company, had a browser was custom-built for them in Korea, and had its “Accept-Language” header hard-coded to
always request Korean, something which led to much confusion for the Flickr users amongst their American customers."