Avestan is the sacred language of the Zoroastrians in which they perform most of their rituals. It is known only from its use in the rituals of modern Zoroastrians and the manuscripts reproducing these rituals since the 13th century. Although sure dates cannot be provided, it is very likely that the creation of the liturgical corpus extended from the end of the 2nd millennium BCE until the end of the Achaemenid period (4th cent. BCE). This corpus includes texts in at least three linguistic la...