The other evidence of Aryans apart from India are Mitanni archives. Linguists were surprised to notice there, among numerous Hurritic and Urartian texts, Aryan words in one of the texts dedicated to the horseback riding. Several special terms and some grammar construction in the text show that it was written in a dialect very close to Vedic Aryan and somehow to Avestan . In other Mitanni texts several Indic deities are mentioned, and this makes us think that Aryans was a rather influential ethnic group in the Mitanni Empire from the 17th to the 14th century.
Some phonetic features make it close to Iranian languages.
In the 14th century, when Mitanni was destroyed by Hittites, the Aryan language was assimilated by Semitic tongues.