Punjabi was a language spoken in this area.
Prem believed that Muslims, Hindus and Sikhs once lived in peace in regions like the Punjab. However, the Partition of India divided the Punjab across religious lines and conflict ensued. Hindu and Muslim intermarriage, such as the case of Prem and Umbreen, led to both prejudice and violence.
The Thirteenth Doctor and her companions Ryan Sinclair, Yasmin Khan, and Graham O'Brien visited the Punjab in 1947 at the beginning of the partition, when Pakistan's independence was announced on the radio. The Thijarians also visited the Punjab during this time, knowing of the countless unseen deaths that would take place in the coming days. (TV: Demons of the Punjab)