As someone who uses websites, if you're not going to respect the browser's language setting (and most websites don't, for good reason) then please use a flag so

As someone who uses websites, if you're not going to respect the browser's language setting (and most websites don't, for good reason) then please use a flag so that it's easy to find where I can switch away from your incorrectly-geodetected language setting. Flags do in fact represent languages, in that they are understood to denote languages, even if some people think they shouldn't.