Punjab
The major language spoken in the Punjab is Punjabi. In the Indian Punjab this is written in the Gurmukhi script. Pakistan uses the Shahmukhi script, that is closer to Urdu script. Hindi, written in the Devanagri script, is used widely in the Indian states of Himanchal Pradesh and Haryana. Several dialects of Punjabi are spoken in the different regions. The Majhi dialect is considered to be textbook Punjabi and is shared by both countries.
Demographics of Pakistan
Around 80% of Pakistan's population speak one or more of the various Indo-Aryan languages. Usually concentrated in the heavily populated areas east of the Indus river, the Indo-Aryan languages and their cultures form the predominant cultural group in the country. They derive their roots from the Sanskrit language of Aryan invadors and are later heavily influenced by the languages of the later Muslim arrivals (i.e., Turkish, Persian, and Arabic), and are all written in a variant of either the Arabic or Nastaliq script. Urdu, the country's national language, is an Indo-Aryan tongue. Punjabi, Hindko and Seraiki, all mutually intelligible, are classified by linguists as dialects of an Indo-Aryan speech called Lahnda, also spelled as Lehnda. These are also, to a lesser extent, mutually intelligible with Urdu. Added together, speakers of these mutually-intelligible languages make up nearly two-thirds of Pakistan's population. Sindhi is the common language of the people of Sindh in southern Pakistan and has a rich literary history of its own, traced back to the era of the early Arab arrivals. The Dardic languages of Gilgit–Baltistan, Azad Kashmir and the northwestern mountains are sometimes classified by many linguists as belonging to the Indo-Aryan family. Other Indo-Aryan languages include Gujarati, Kutchi, Memoni and others.