That was my guess too. I haven't checked if they ignore it for all languages, or just English. I remember being very confused when another site (wttr.in) would

That was my guess too. I haven't checked if they ignore it for all languages, or just English. I remember being very confused when another site (wttr.in) would show up in Russian on a friend's computer for some reason. I later learned that clicking "never translate <language>" back then in chrome's prompt to translate would add that language to the Accept-Language header. The site then served this version, despite en-ie and en being higher priority.