Planet Karaoke
From Tardis Wiki, the free Doctor Who reference
Planet Karaoke was a planet once visited by the Twelfth Doctor and Clara Oswald. (COMIC: Day of the Tune, The Meddling of Clara's Song, One! Two! Three! Four! To Doomsday)
The natives of Planet Karaoke spoke Karaokean. (COMIC: The Meddling of Clara's Song)