Re: google translate anyone?
> who creates admin accounts with a localised name?
Maybe the localisation system? I don't know this particular system, but if you install Windows to use Finnish, it helpfully shows nearly everything in the UI in Finnish. The underlying admin user name might not be altered, but what the GUI shows is.
My son accidentally set the language to Spanish when taking his new Windows PC in use. That was fun (and lucky it was not Hebrew or Chinese). It still occasionally shows some texts in Spanish, even after trying to tell it we want to run it in Finnish. Probably would require a reinstall.