Gandari
Appearance
Gāndhārī was a north-western prakrit spoken in Gāndhāra, with some relation to Sanskrit. It has been found written in the Kharoṣṭhī script. Scholars believe that the language featured elements from the languages native to the area (before Indo-European population), Indo-Aryan tribal languages, as well as Dardic and East-Iranian ethnic languages.
Further Reading
Yu. V. Gankovsky, The Peoples of Pakistan: An Ethnic History. Translated from the Russian by Igor Gavrilov (Lahore: Peoples' Publishing House, 1964)
Reference
Rahman, Dr. Tariq, Peoples and Languages in Pre-Islamic Indus Valley. Available online via The University of Texas.