In his works regarding the history of Tabriz, Mustawfi mentions that before the arrival of the Mongols the people of Tabriz spoke Pahalavi Persian and later began to speak Adhari Turkish during Illkhanate rule. He also mentions that the people of Maragha, Zanjan and Ardabil had their own Persian dialects.
Verily God hath preferred amongst His creatures of the Arabs the Quraysh, and among the Persians the men of Fars : for which reason the people of this province . . . were known as ' the Best of the Persians.'