Hinduism
Hinduism is traditionally considered to have one liturgical language, Sanskrit. It is the language of the Vedas, Bhagavadgita and the Upanishads, and various other liturgical texts such as the Sahasranama, Chamakam and Rudram. It is also the tongue of most Hindu rituals.
The people following Kaumaram, Vainavam, Shaivam sects of Tamil Nadu use Tamil as liturgical language along with Sanskrit. Divya Prabandha is chanted in most of the South Indian Vishnu temples. Tamils consider their language to be sacred and divine with equal status to Sanskrit within temple rituals. The divya prabhandams and Devarams are referred to as Dravaida Vedam (Tamil Veda). A long standing myth states that Sanskrit and Tamil emerged from either side of Lord Shiva's divine drum of creation as he danced the dance of creation as Nataraja or sound of cosmic force.
Read more about this topic: Sacred Language