According to Wikipedia, Sindhi is an Indo-Aryan language of the historical Sindh region, spoken by the Sindhi people. It is the official language of the Pakistani province of Sindh. In India, Sindhi is one of the scheduled languages officially recognized by the federal government. It has influences from Balochi spoken in the adjacent province of Balochistan.
Sindhi has a vast vocabulary and a very old literary tradition. This trend has made it a favorite of many writers and consequently a vast volume of literature and poetry have been written in Sindhi.

This translation of Holy Quran has been done by Professor Abdul Qadir Dahri and Ghos Buksh Sheikh Sahib, under the auspices of Hadrat Mirza Tahir Ahmad, fourth successor of the Promised Messiah.