lesgo
(ok not quite mauritania but part of it)
EMIRATE OF TRARZA
Muhammad al Habib
Capital: Merderdra
Other cities: Rosso, some other stuff presumably
UA: Hassaniya Castes - Every time a great person is born, receive a related boost in the capital, depending on the era they are gained in. Resistance in conquered cities is reduced by 50%.
UU: Znaga: The Znaga replaces the worker. The Znaga can be expended on any resource to grant access to that resource as well as a +1 gold increase on the tile they were expended on.
EG: A znaga is expended on a copper resource. The empire now has access to copper, as well as a +1 gold above its usual bonus. This is done through a "special" improvement.
UB: Zawiya Quarter: Replacing the University, the Zawiya quarter receives a bonus to science from desert instead of jungle tiles.