Undubbing
Undubbing is a type of video game hacking that restores the original language audio content of a game that has been localized for export while retaining the translated text of the language into which it has been localized. A typical candidate for an undub is a Japanese game which has been published in the United States, with voice acting dubbed in English and text content translated into English, but lacking an in-game option to use the original Japanese audio.