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.
Pashto
Pashto (, , "Pax̌tō" ), sometimes spelled Pukhto, is the language of the Pashtuns. It is known in Persian literature as Afghāni () and in Hindustani literature as Paṭhānī. Speakers of the language are called Pashtuns/Pakhtuns/Pathans and sometimes Afghans. It is an Eastern Iranian language, belonging to the Indo-European family. Pashto is one of the two official languages of Afghanistan, and it is the second-largest regional language of Pakistan, mainly spoken in the west and northwest of the country. In Pakistan, it is the majority language of the province of Khyber Pakhtunkhwa and the northern districts of Balochistan. Along with Dari Persian, Pashto is the main language among the Pashtun diaspora around the world. The total number of Pashto-speakers is estimated to be 45–60 million people worldwide.