Avestan
Avestan is the language of ancient Iran, surviving only in the sacred Zoroastrian scriptures known as the Zend Avesta. In the past the language was known as 'Zend', but this was later considered a misuse of this word. The oldest form of Avestan, spoken by Zoroaster himself, is found in the Gathas.
Western study of Vedic and Avestan at the end of the 18th century was responsible for the discovery of the Indo-European language group, and thus to the creation of modern linguistics and philology. Avestan was soon recognised as belonging to the family of Iranian languages which is a subfamily of the Indo-European.
