So what do you think how old is modern Hindi language, the language we use in our daily conversation? If you don't have an idea, this may surprise you. Let's checkout Wikipedia for some facts on Hindi:
The common dialect among people kept on changing from "Vedic Sanskrit" to what was called "Hindavi" until 17th century. "Hindavi" is the language you will find in Kabir's work. The dialect kept evolving while the grammar was modified to our current grammar. This language was called "Khari boli" and later "Urdu". Urdu was very successful and quickly replaced older languages like Persian in Delhi and nearby states during 18th century.
It was at the dawn of 19th century some authors used Devanagari script (originally used in Sanskrit) to write their work in "Khari boli". This script-language combination with bias on use of Sanskrit words was termed "Hindi". During 1850s, the first Hindi newspaper was published and later poets, writers and fundamentalists proposed Hindi as our national language. Finally, Hindi became the language of Government Offices in 1949.
So if someone asks you what is the age of modern Hindi language and Hindi writings, you say around 150-200 years.
