imga can travel like anyother cretuer if its in skyrim put like 2 in the game but still let you play as one :spotted owl:
Yes, they can travel, but for the Imga to have any substance, personality and history, it would be much better for them to make an appearance in a region where they actually exist, so that we can experience their culture and character. I suppose they could just add some books about it, but that would be quite boring, in comparison. Of course, they should write books even if the game took place in Valenwood.
Otherwise, they would just seem to have been put in as a desperate act to find some new playable race. Like, "Hey, we can't add Dremora, or any Akaviri race, so what do we have left?"
"Well, there's the Maormer, and the Imga..."
"Oh, the monkeys! Yea, lets put those in, and give them a special poo-throwing ability!"