Pāli is a Middle Indo-Aryan liturgical language on the Indian subcontinent. It is widely studied because it is the language of the Buddhist Pāli Canon or Tipiṭaka as well as the sacred language of Theravāda Buddhism.
19th century Burmese Kammavācā (confession for Buddhist monks), written in Pali on gilded palm leaf
A sacred language, holy language or liturgical language is a language that is cultivated and used primarily for religious reasons by people who speak another, primary language in their daily lives.
Eastern Orthodox liturgy in the United States