If so, what about the rest of the OS? The browser will only take up what language the OS is set as.
That said, it looks like I am wrong.
See if you can uninstall the Spanish version of IE, guidance here;
Then install the English version of IE, guidance here;
One caveat: Do you have another browser you can use to re-visit the MS web site and download the proper version?
New computer, downloaded explorer while in mexico came out in spanish, now home in usa and all still in spanish