I know Gecko's solution will allow you to install a multil language cd in a language other than English. A customer accused me of switching an HP printer driver disk when I returned his machine. It only booted in Spanish--his kids had messed with it

That fixed it.
I've noticed a lot of software that I've downloaded from emule (Microsoft goodies) can be in French, Italian, Spanish or as in my last fiasco, Korean

. Its made for that country.
Unless that machine was speaking englase a while back, I would suspect that your going to need a Spanish English dictionary.
I've installed English apps on a Tiawanese system. The yes,no and I agree prompts are in the same locations. You can't read them, but you can figure it out from an Engish system. MS Office worked OK
I could be wrong, It happens now and then--this could be one of those "then" days