Punjabi (; ; , ), sometimes spelled Panjabi, is an Indo-Aryan language of the Punjab region of Pakistan and India. It has approximately 113 million native speakers. Punjabi is the most widely-spoken first language in Pakistan, with 80.5 million native speakers as per the 2017 census, and the 11th most widely-spoken in India, with 31.1 million native speakers, as per the 2011 census. The language is spoken among a significant overseas diaspora, particularly in Saudi Arabia, the United Arab Emirates, Canada, the United Kingdom, and the United States. In Pakistan, Punjabi is written using the Shahmukhi alphabet, based on the Perso-Arabic script; in India, it is written using the Gurmukhi alphabet, based on the Indic scripts. Punjabi is unusual among the Indo-Aryan languages and the broader Indo-European language family in its usage of lexical tone. History Etymology The word Punjabi (sometimes spelled Panjabi) has been derived from the word Panj-āb, Persian for 'Five Waters', referring to the five major eastern tributaries of the Indus River. The name of the region was introduced by the Turko-Persian conquerors of South Asia and was a translation of the Sanskrit name for the region, Panchanada, which means 'Land of the Five Rivers'. Panj is cognate with Sanskrit (), Greek pénte (), and Lithuanian Penki, all of which meaning 'five'; āb is cognate with Sanskrit áp () and with the of . The historical Punjab region, now divided between India and Pakistan, is defined physiographically by the Indus River and these five tributaries. One of the five, the Beas River, is a tributary of another, the Sutlej. Origin Punjabi developed from Prakrit languages and later (, 'deviated' or 'non-grammatical speech') From 600 BC, Sanskrit developed as the standard literary and administrative language and Prakrit languages evolved into many regional languages in different parts of India. All these languages are called Prakrit languages (Sanskrit: ) collectively. Paishachi Prakrit was one of these Prakrit languages, which was spoken in north and north-western India and Punjabi developed from this Prakrit. Later in northern India Paishachi Prakrit gave rise to Paishachi Aparbhsha, a descendant of Prakrit. Punjabi emerged as an Apabhramsha, a degenerated form of Prakrit, in the 7th century AD and became stable by the 10th century. The earliest writings in Punjabi belong to Nath Yogi era from 9th to 14th century. The language of these compositions is morphologically closer to Shauraseni Apbhramsa, though vocabulary and rhythm is