West Punjab
At Independence there was a Muslim majority in West Punjab with significant Hindu and Sikh minority. Nearly all of these minorities left West Punjab for India, to be replaced by large numbers of Muslims fleeing from the opposite direction. The official language of West Punjab was Urdu but most of the population spoke Punjabi using the Shahmukhi script. The linguist George Abraham Grierson in his multi volume Linguistic Survey of India (1904–1928) considered the various dialects up to then called "Western Punjabi", spoken in North, West, and South of Lahore in what is now Pakistani Punjab, as constituting instead a distinct language from Punjabi. (The local dialect of Lahore is the Majhi dialect of Punjabi, which has long been the basis of standard literary Punjabi.) Grierson proposed to name this putative language "Lahnda", and he dubbed as "Southern Lahnda" the coherent dialect cluster now known as Saraiki spoken in Multan Dera Ghazi Khan and Bahawalpur division and "North Lahnda" now known as Potwari spoken in Rawalpindi division and "Western Lahnda" now known as Hindko spoken in the regions bordering Khyber-Pakhtunkhwa.
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).