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.
Punjabi Hindus
Because the Punjabi Hindus stated Hindi as their mother tongue (due to fear of sikh hegemony as Punjabi Hindus have Punjabi as their first language) in the censuses of 1951 and 1961, after the trifurcation, many areas being mostly Punjabi Hindu were given to Haryana and Himachal Pradesh, which made Punjab a Sikh-majority state in India.