Anyway, you are looking for a setting to Factory Reset or Return to factory defaults. Something like that. You'll be asked for a language and you want English_US.
Depending on the true model, you might be looking for an icon with a bunch of flags to set the language.
If you cannot determine the proper model number, take a picture of the screen with a map displayed as we then may be able to determine which type of device you have and point you in the proper direction, as dhn said.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.