But the user experience is extra poor, because they do not honor the Accept-Language header, but insist to use the local language of your public IP address. When travelling that can often be a language you don't understand. And when travelling you often get an extra security step, because they haven't seen you in that country before. Extra painful in a language you don't understand.
Disclaimer: I use Cookie Autodelete and Firefox containers. So they get a bit less info about me than about the average user. But ignoring Accept-Language makes no sense to me. Pretty unlikely the user does not understand the language of the browser but the local language of the IP address.