Listen to Nwng Swrwlai online. Nwng Swrwlai is a Kokborok language song and is sung by Bimal Debbarma, Janardhan Debbarma and Subhadra Debbarma. Nwng Swrwlai, from the album Imango Phaiwoi, was released in the year 2011. The duration of the song is 5:28. Download Kokborok songs online from JioSaavn.