If you don't have the manual, you can find it here:http://h10032.www1.hp.com/ctg/Manual/c00702867.pdfThe manual doesn't give instructions on how to do a reset to factory default settings, but at least it has information on the menu structure so you should be able to figure out how to get the language back to English.Strictly guessing, I'd try turning on the printer (no card installed) while holding one of the other buttons on top down. I'd start with the "print" button and cycle through all available combinations until I got lucky.