It's extremely {whatever}-centric to assume that IP location in any way implies anything about one's preferred language. There are multi-lingual countries. There are cultural minorities. People travel. (Not to mention VPNs becoming more popular these days.)

So I always found it infuriating that web sites would try to guess my language from geoip when my browser already sends Accept-Language headers. They spend resources doing this stuff, think they're doing their users a service, give themselves a pat on the back, and then unnecessarily screws up the UX for a significant portion of the users.

I have no idea why companies keep doing this.