Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Waja (also known as Nyan Wiyau, Wiyaa, or Wuya) is a Savannas language of Northe eastern Nigeria. Dialectical differences between Deruwo (Wajan Dutse) and Waja proper (Wajan Kasa) are slight.
Dialects
Waja dialects:
Wɩyáà (Wajan Kasa), spoken in ten settlements, including Talasse (main settlement that is home to the Emir of Waja).
Derúwò (Hill Waja or Wajan Dutse), spoken in Deri. There are two varieties:
Putoki, Kulani, and Degri
Sikkam and Degri
References
Waja at Ethnologue (18th ed., 2015) (subscription required)