Punjab, Pakistan
The major and native language spoken in the Punjab is Punjabi (which is written in a Shahmukhi script in Pakistan) and Punjabis comprise the largest ethnic group in country. Punjabi is the provincial language of Punjab, but is not given any official recognition in the Constitution of Pakistan at the national level.
Languages of Pakistan
Saraiki (Sarā'īkī, also spelt Siraiki, or less often Seraiki) is an Indo-Aryan language of the Lahnda group, spoken in the south-western half of the province of Punjab. Saraiki is to a high degree mutually intelligible with Standard Punjabi and shares with it a large portion of its vocabulary and morphology. At the same time in its phonology it is radically different (particularly in the lack of tones, the preservation of the voiced aspirates and the development of implosive consonants), and has important grammatical features in common with the Sindhi language spoken to the south. Saraiki is the first language of about 20 million people in Pakistan, its territory ranges across southern Punjab, parts of southern Khyber Pakhtunkhwa, and some border regions of northern Sindh and eastern Balochistan.