BTW. I accidentally discovered that in case of accessing google.com from non-English speaking country, `en-US` is treated as non-reliable (probably because many

BTW. I accidentally discovered that in case of accessing google.com from non-English speaking country, `en-US` is treated as non-reliable (probably because many devices have this set as default), whereas `en-IE` for example is treated as reliable. Also appending any non-English language after `en-US` does the trick AFAIR. Basically `en-US`-only Accept-Language seems to be treated as "perhaps default language of a device and user didn't change it, we should not rely on it" and IP-based localization is applied in that case ("in France? ok show French version").