Who wrote sursagar and in which language?

"Sursagar" is a musical composition, not a literary work. It was composed by Saint Surdas, a blind poet-musician of the 16th century, in the Braj Bhasha dialect of Hindi.

Here's a breakdown:

* Sursagar: A collection of devotional songs and poems praising Lord Krishna. It is known for its lyrical beauty and spiritual depth.

* Saint Surdas: A renowned blind poet-musician who is considered one of the greatest Vaishnavite saints in India.

* Braj Bhasha: A dialect of Hindi that originated in the Braj region of Uttar Pradesh, India. It is known for its lyrical quality and is often used in devotional literature.

Therefore, "Sursagar" is not a literary work written in a particular language, but rather a collection of devotional songs composed by Saint Surdas in the Braj Bhasha dialect of Hindi.