Mountain Language is a one-act play written by Harold Pinter, first published in The Times Literary Supplement (TLS) on 7–13 October 1988. It was first performed at the Royal National Theatre in London on 20 October 1988 with Michael Gambon and Miranda Richardson. Subsequently, it was published by Faber and Faber (UK) and Grove Press (USA). Mountain Language lasts about 25 minutes in production. It was most recently performed as part of Theatre of Menace (2016) at the Smock Alley Theatre in Dublin, starring , Paul Carmichael, , Jaime Peacock, and Natasha Ryan