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.
Saraiki language
In 1919, Grierson maintained that the dialects of what is now the southwest of Punjab Province in Pakistan constitute a dialect cluster, which he designated "Southern Lahnda" within a putative "Lahnda language". Subsequent Indo-Aryanist linguists have confirmed the reality of this dialect cluster, even while rejecting the name "Southern Lahnda" along with the entity "Lahnda" itself. Grierson also maintained that "Lahnda" was his novel designation for various dialects up to then called "Western Punjabi", spoken north, west, and south of Lahore. The local dialect of Lahore is the Majhi dialect of Punjabi, which has long been the basis of standard literary Punjabi. However, outside of Indo-Aryanist circles, the concept of "Lahnda" is still found in compilations of the world's languages (e.g. Ethnologue).