Well, a little bit of knowledge is a dangerous thing ... or so I have been advised* a fair few times in my life.
No, the BIOS won't help, and neither would the OS (Windows settings) ... but I would be very surprised if the language cannot be changed somewhere at the application itself.
If not at one of the menus, maybe there's a config file there somewhere behind the scenes. I would expect such a file to contain plain text.
Is it possible to "boot" to the OS (Win XP) during start-up?
Meanwhile, continua a scavare
* Generally by pompous folk trying to protect their own turf.