Examples of in-universe languages which have involved subtitles are: * Vulcan (Star Trek: The Motion Picture; Star Trek II: The Wrath of Khan; ENT: "Home") * Klingonese (Star Trek: The Motion Picture; Star Trek III: The Search for Spock; TNG: "Heart of Glory" ; Star Trek VI: The Undiscovered Country; Star Trek Into Darkness; DIS: "The Vulcan Hello", "Battle at the Binary Stars", "The Butcher's Knife Cares Not for the Lamb's Cry", "Lethe", "Si Vis Pacem, Para Bellum", "Into the Forest I Go" )