I agree with Alan about pseudo-races and Machete about 9. In the third game, 9 races proved themselves well, and more, in my opinion, is not needed:)
What about 5 evil, 5 good, and 5 neutral races?
There was already a topic about dividing races according to the AD&D worldview, that is, there should not be more than 3 races per side.
So, there will be 5 evil races, but what will be the difference in their goals and views on the world?