What language do the Tartars speak in The Golden Compass film?

In The Golden Compass film, the Tartars communicate in a unique language called "Tartarian". This fictional language is inspired by various Uralic and Siberian languages, blending sounds and grammatical constructions from these language families. The actor Roger Ashton-Griffiths, who portrayed the role of Bolvangar, the King of the Tartars, developed this Tartarian language for the film.