Old Azeri
Old Azeri (آذری, Āzarī; also spelled Adhari, Azeri or Azari) is the extinct Iranian language that was once spoken in the northwestern Iranian historic region of Azerbaijan (Iranian Azerbaijan) before the Turkification of the Azerbaijani people. Some linguists believe the southern Tati varieties of Iranian Azerbaijan around Takestan such as the Harzandi and Karingani dialects to be remnants of Old Azeri.