Punjabi language
In India, Punjabi is one of the 22 scheduled languages of India. It is the first official language of the Indian State of Punjab. Punjabi also has second language official status in Delhi along with Urdu, and in Haryana. 
In Pakistan, no regional ethnic language has been granted official status at the national level, and as such Punjabi is not an official language at the national level, even though it is the most spoken language in Pakistan after Urdu, the national language of Pakistan. It is, however, the official provincial language of Punjab, Pakistan, the second largest and the most populous province of Pakistan as well as in Islamabad Capital Territory. The only two official national languages in Pakistan are Urdu and English, which are considered the lingua francas of Pakistan.The Majhi (ماجھی ਮਾਝੀ) dialect spoken around Amritsar and Lahore is Punjabi's prestige dialect. Majhi is spoken in the heart of Punjab in the region of Majha, which spans Lahore, Amritsar, Gurdaspur, Kasur, Tarn Taran, Faisalabad, Nankana Sahib, Pathankot, Okara, Pakpattan, Sahiwal, Narowal, Sheikhupura, Sialkot, Chiniot, Gujranwala and Gujrat and in Mandi Bahauddin(97’/.) districts.
History of the Punjabi language
Punjabi is an Indo-Aryan Language developed from Old Indo-Aryan Languages, which were closely related to Vedic Sanskrit and Classical Sanskrit. By 300 BC Old Aryan Languages developed into many local dialects known as Middle Indo-Aryan dialects. Literary from these dialects was known as Prakrit. Shauraseni used in Eastern Punjab and Kaikeyi used in Western Punjab were among the famous Prakrits of ancient Indian Subcontinent. By 500 AD these Middle Indo-Aryan dialects had been developed many local features and lost many inflectional morphemes. Literary form of these dialects is known as Apabhramsha (ਅਪਭ੍ਰੰਸ਼,اپبھرنش). Principle Apabhramshas are Takka Apabhramsha in Central Punjab and Vrachada Apabhramsha in Southern Punjab. By 1200 AD these Apabhramshas or 'corrupt dialects' had few inflectional morphemes left. During Middle Ages Takka Apabhramsha developed into Lahori dialect and Vrachada Apabhramsha developed into Multani dialect.