I love this concept... it takes the humanity out of alien/foreign/different races. If done properly, you can easily conceptualise different views of the world. Something like the sort of thing John Scalzi has done with his works - let's work through how a different viewpoint actually works and then work out where the jagged edges are - all of a sudden, the different races are fighting with each other because they see the world diferently and don't communicate properly so they assume all of the others think the same way (because they can't concieve of anythign else without looking that far into it) and boom you've got a realistic world with in-built fracture lines...