How do you change the language setting in XP Home Edition?

My mom’s computer basically died and her tech guy was working on it. The PC was bought in the US and is running a US version of XP Home (so I know it’s possible to get it in English).

The issue is that she’s in Italy and her tech guy is Italian, so he switched over the language and I’m not sure how to get it back to English for her.

I’m rather confused by the ‘Date, Time, Language, and Regional Options’ menu in Control Panel. Your help would be most appreciated. :)