Partition transformed the way Punjabi was spoken, written and recognised.
In 1947, Punjab was divided between India and Pakistan and millions of people were forced to move across the new border. Muslim communities travelled west, while Sikh and Hindu communities travelled east. They carried their dialects, expressions, songs and storytelling traditions into places where those forms of Punjabi had not previously been dominant.

This movement disrupted older language regions. Punjabi had developed gradually across connected towns, villages and districts, with speech changing rather than stopping at a fixed boundary. Partition placed an international border through this linguistic landscape. Dialects once connected through travel, trade and neighbouring communities were now divided between two countries.

Refugees also changed the speech of the places where they settled. Punjabis from Lahore, Rawalpindi, Sialkot, Gujranwala, Multan and other western districts established communities across eastern Punjab, Delhi and northern India.
At the same time, Muslims leaving Amritsar, Jalandhar, Ludhiana and surrounding areas carried eastern vocabulary and pronunciation into Pakistan. Punjabi therefore survived beyond its original districts, but many local varieties became mixed with those spoken in new places.

Partition did not create the division between Gurmukhi and Shahmukhi.
Both scripts were already in use, alongside Devanagari, Landa-derived scripts and other regional forms of writing. However, the creation of India and Pakistan strengthened the separation between them. Gurmukhi became increasingly connected with Indian Punjab, while Shahmukhi remained the main script used for Punjabi in Pakistan.

In India, the reorganisation of Punjab in 1966 created a smaller Punjabi-majority state, where Punjabi written in Gurmukhi received official recognition and became established in education, government and public signage. Hindi remained influential among some communities and in neighbouring areas that had once formed part of the larger Punjab.

In Pakistan, Urdu was promoted as the national language and became dominant in education, administration and formal media. Punjabi remained the most widely spoken first language in the country, but it was used mainly within homes, villages, music, theatre and informal conversation. Shahmukhi continued to support Punjabi poetry, literature and publishing, although many Punjabi speakers learned to read and write in Urdu or English.

Script also became more closely associated with religion and nationality. Gurmukhi came to be viewed primarily as a Sikh or Indian script, while Shahmukhi became associated with Muslims and Pakistan. Devanagari became connected with Hindu Punjabi communities. These associations can hide Punjab’s more complicated history, in which Punjabi belonged to Muslims, Sikhs, Hindus and other communities and was never limited to one faith or one form of writing.

The border also separated Punjabi literature, publishing and education. A reader trained only in Gurmukhi may be unable to read Punjabi written in Shahmukhi, even when the spoken words are familiar. The same work may therefore need to be transliterated from one script into another before it can reach readers across the border. Books, newspapers and historical records can appear foreign to people who already understand their language when it is spoken.

Despite this separation, Punjabi continued to travel through migration, music, film, poetry and family memory. Later generations of the diaspora carried the language to other parts of the world, where different dialects met again within the same communities. Roman Punjabi also became increasingly common online, allowing speakers from both sides to communicate without first learning one another’s script.

Partition divided the institutions surrounding Punjabi, but it did not divide the language completely. Pronunciation, vocabulary and writing developed differently on either side, yet songs, conversations and oral traditions remain widely understood across the border.