Combined: the text is most likely a filename or search tag used in warez scene releases, ROM sites, or USB loader backup naming schemes from the late 2000s–early 2010s. It isn't an official Nintendo term; it describes a region-specific, WBFS-formatted backup of the game for USB loading.
The NTSC-U (North American) version defaults to English, making it the preferred choice for English-speaking players globally. What is a WBFS File? mario party 8 wii ntscwbfs exclusive