Since Fairphone is Dutch it kinda makes sense they'd make this mistake. I suppose if you'd e-mail them about it they'd be open to making the change. They're probably not even aware of it.
It gets more difficult if even the script is different. I once installed some Chinese app that would put the language picker in Mandarin and their symbols. I really didn't know how to change it to anything I could understand so I'd go by all of them one by one until I found a language I understood.
Good call, totally agree