sentences:  He is generally considered the first Uzbek playwright, the founder of modern Uzbek musical forms, as well as the founder of Uzbek social realism.Niyazi also participated in the controversial Uzbek language reforms of the 1920s which were meant to codify a literary Uzbek language in place of the older, fading Chagatai.In addition to Uzbek, Niyazi knew many other languages, including Arabic, Persian, Russian, and Turkish.