Website language switching error
This would be a great feature except that the language detection seems incorrect.
My Firefox sends 'Accept-Language: en-GB, fr;q=0.7, en;q=0.3'
What I would expect is that the server decides that British English 'en-GB' has the highest priority so uses English.
Instead, French 'fr' is selected even though its quality is 0.7. Presumably it calculates that English 'en' is 0.3 so is less favoured than French. This is not a correct outcome.
There is a workaround: edit the address manually or use the language link at the bottom of the page.
BTW, Firefox language preferences are also buggy: it does not allow American English to be removed (why not?) and it appears to send 'en' instead of 'en-US' for American English. There is no 'English' option in my Firefox (why not?).