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.
History of East Pakistan
One of the most divisive issues confronting Pakistan in its infancy was the question of what the official language of the new state was to be. Mohammad Ali Jinnah yielded to the demands of refugees from the Indian states of Bihar and Uttar Pradesh, who insisted that Urdu be Pakistan's official language. Speakers of the languages of West Pakistan (Punjabi, Sindhi, Pushtu, and Baluchi) were upset that their languages were given second-class status. In East Pakistan, the dissatisfaction quickly turned to violence. The Bengalis of East Pakistan constituted a majority (an estimated 54%) of Pakistan's entire population. Their language, Bengali, like Urdu, belongs to the Indo-Aryan language family, but the two languages have different scripts and literary traditions.