In Lingua Mortua is a Norwegian band formed by Lars Fredrik Frøislie in 1999 at Hønefoss, Norway.
The music can be described as a mixture of 1970s progressive rock and black metal, and vintage instruments like the Mellotron, Chamberlin, Minimoog, Clavinet and Hammond organ are used frequently, as well as saxophone, bass clarinet, steel guitar, Ludwig drums and Rickenbacker bass.
[3] Jørgen Munkeby from Shining (NO) was influenced by the Salon des refusés session, quoting: “Lars’ refreshing blend of an impressive intellectual display and direct raw power has been a big inspiration for me.
He was the first person to invite me to play sax in a black metal setting, and in so doing, contributed strongly to SHINING’s later development of the Blackjazz genre.”[4] Lingua Mortua is Latin for "Dead Language".
Whether the band's intention is an homage to Mussorgsky's piece "Cum mortuis in lingua mortua" from Pictures at an Exhibition is unclear.