"extinct indigenous language" . . "historical language" . . "extinct language" . "exinct" . . "extinct dialect" . . "Extinct_language" . . "gone extinct" . . "dead language" . "extinct" . "Extinct language" . "Extinct" . "sleeping" . "the language of the dead" . "dead languages" . "asleep" . "fall into disuse" . . . . "Extinct language" . "becoming extinct" . "dormant" . . "extinction" . . "Sumerian" . "no longer spoken" . "language" . "extinct relatives" . "died out" .