Punjabi language
Doabi is spoken in both the Indian Punjab as well as parts of Pakistan Punjab owing to post-1947 migration of Muslim populace from East Punjab. The word "Do Aabi" means "the land between two rivers" and this dialect was historically spoken between the rivers of the Beas and the Sutlej in the region called Doaba. Regions it is presently spoken includes the Jalandhar, Hoshiarpur and Kapurthala districts in Indian Punjab, specifically in the areas known as the Dona and Manjki, as well as the Toba Tek Singh and Faisalabad districts in Pakistan Punjab where the dialect is known as Faisalabadi Punjabi.
Demographics of Pakistan
On the annexation of Sindh (1843) and Punjab (1849), the British Raj encouraged its use as the "lingua franca" and subsequently banned the use of Persian, which had been the "lingua franca" of the region for many centuries before. Persian had been introduced by Central Asian Turkic invaders who migrated into South Asia, and had been patronised by the Turko-Afghan Delhi Sultanate. This language change was designed to institute a universal language throughout the then British Raj in South Asia as well as minimize the influence that Persia, the Ottoman Empire and Afghanistan had on this transitional region.