The onset of the Hindi-Urdu controversy of 1867 saw the emergence of Sir Syed as a champion for cause of the Urdu language. He became a leading Muslim voice opposing the adoption of Hindi as a second official language of the United Provinces (now Uttar Pradesh). Sir Syed perceived Urdu as the "lingua franca" of the United Provinces which was created as a confluence of Muslim and Hindu contributions in India. Having been developed by during the Mughal period, Urdu was used as a secondary language to Persian, the official language of the Mughal court. Since the decline of the Mughal dynasty, Sir Syed promoted the use of Urdu through his own writings. Under Sir Syed, the Scientific Society translated Western works only into Urdu. The schools established by Sir Syed imparted education in the Urdu medium. The demand for Hindi, led largely by Hindus, was to Sir Syed an erosion of the centuries-old Muslim cultural domination of India. Testifying before the British-appointed education commission, Sir Syed controversially exclaimed that "Urdu was the language of gentry and Hindi that of the vulgar." His remarks provoked a hostile response from Hindu leaders, who unified across the nation to demand the recognition of Hindi.