 Modern Hindi and its literary tradition evolved towards the end of the 18th century.John Gilchrist was principally known for his study of the Hindustani language, which was adopted as the lingua franca of northern India (including what is now present-day Pakistan) by British colonists and indigenous people.He compiled and authored "An English-Hindustani Dictionary", "A Grammar of the Hindoostanee Language", "The Oriental Linguist", and many more.