Travel Back In Time To See Old Iran
The multitude of Middle Iranian languages and peoples indicate that great linguistic diversity must have existed among the ancient speakers of Iranian languages. Of that variety of languages/dialects, direct evidence of only two have survived. These are: Avestan, the two languages/dialects of the Avesta, i.e. the liturgical texts of Zoroastrianism.
Old Persian, the native language of a south-western Iranian people known as Persians.
Indirectly attested Old Iranian languages are discussed below.