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.
India–Pakistan relations
Apart from Hindustani, India and Pakistan also share a distribution of the Punjabi language (written in the Gurmukhi script in Indian Punjab, and the Shahmukhi script in Pakistani Punjab), Kashmiri language and Sindhi language, mainly due to population exchange. These languages belong to a common Indo-Aryan family that are spoken in countries across the subcontinent.