The Saraiki language (Perso-Arabic: سرائیکی sometimes spelled Siraiki and Seraiki) is closely related to Punjabi. It is spoken by about 20 million Pakistanis, mostly in the southern part of Punjab Province and in adjacent parts of Sindh, Balochistan and Khyber Pakhtunkhwas. Saraiki belongs to the Indo-Aryan branch of Indo-European.