Punjabis
The main language of the Punjabi people is Punjabi and its associated dialects, which differ depending on the region of Punjab the speaker is from; there are notable differences in the Lahnda languages, spoken in the Pakistani Punjab. In the Pakistani Punjab, the vast majority still speak Punjabi, even though the language has no governmental support. In the Indian Punjab, most people speak Punjabi. English is sometimes used, and older people who lived in the undivided Punjab may be able to speak and write in Urdu. The Punjabi languages have always absorbed numerous loanwords from surrounding areas and provinces (and from English).
Languages of Pakistan
Bengali (بنگالی) is not an official language in Pakistan, but a significant number of Pakistani citizens have migrated from East Bengal and live in West Pakistan or East Pakistan prior to 1971. Bengali was recognised as the second official language of Pakistan on 29 February 1956, and article 214(1) of the constitution of Pakistan was reworded to "The state language of Pakistan shall be Urdu and Bengali". Others include illegal immigrants who migrated from Bangladesh after 1971. Most Pakistani Bengalis, are bilingual speaking both Urdu and Bengali, and are mainly settled in Karachi.