For anyone wondering what the command to change his voice is, it's /monaen on/off
Also just a heads up, but the mod isn't packaged properly. When I initially installed it, the model and voices weren't working and I could only see the animation bones. I had to create a new zip file in order to get the mod to work ingame. If you're still updating this mod, I could send you my own fix and you could possibly upload that