Question

how did amir khusrau contribute towards knowledge of different languages​

Answer 1

Khusrau wrote primarily in Persian. Many Hindustani (historically known as Hindavi) verses are attributed to him, since there is no evidence for their composition by Khusrau before the 18th century. The language of the Hindustani verses appears to be relatively modern. He also wrote a war ballad in Punjabi.