Dzongkha is the national language of the Kingdom of Bhutan. Dzongkha bears a linguistic relationship to modern Tibetan as that between Spanish and Italian. The modern language pairs have lost mutual comprehensibility but they share a common ancestor language which is still used in liturgical contexts. Thus religious professionals in Spain and Italy study Latin the religious language of Roman Catholicism, while monks in Tibet and Bhutan study Old Tibetan the sacred language of Tibetan Buddhism. In Bhutan this preserved sacred language is referred to as Chhokey.