why is my dc games in french

i bought a dc on ebay, it says ntsc u, but any game that has the option automaticly goes to french. why is this and is there a way to make goto english as the default language. if you do not understand my prob. here is an example. i put in worms world party and it uses the french language not english like it does in my friends, i change the language settings to us englidh and save but when i turn it off and back on it is in french again, soul caliber is in french too. please help if you can