Nintendo will add warnings to Wii Karaoke U since some of the downloadable content for the game includes explicit lyrics.
Unlike other music games which include the non-explicit versions of tracks, the songs contained within Wii Karaoke U have all sweary words intact, like Afroman's Colt 45, as discovered by Nintendo Life.
After some complaints, Nintendo has told Eurogamer it will be posting a warning on the eShop page, giving parents a fair amount of time to reconsider whether to download the app or not. The warning will now also appear when users purchase an access token for the singing game.
In the future, yet another warning will be displayed when users launch Wii Karaoke U.
"Wii Karaoke U by Joysound is intended to provide users with access to a large catalogue of songs from a broad range of music labels across a variety of musical genres - designed to appeal to all music tastes. As such Nintendo does not restrict which songs are included in the catalogue of songs featured within the Wii Karaoke U by Joysound application.
"We are aware that some songs contain explicit lyrics and deal with adult themes which some audiences may find unsuitable. As such the Wii Karaoke U by Joysound application currently includes a notice which informs users that music downloads are not rated by PEGI. Wii U owners also have the tools to restrict access to the song catalogue using the Parental Controls feature.
"It is however very important to us that all users of Wii Karaoke U by Joysound understand that some lyrics contained within songs may not be suitable for all audiences and as such we will immediately be implementing an additional message within the Nintendo eShop as well as on the Wii Karaoke U by Joysound website pages.
" In the near future this message will also be incorporated within the notification that is displayed as the Wii Karaoke U by Joysound application is launched."