I believe we can wear the armour if made for our character.

Tribe armour is just a question of style and ressources. Anyone can wear that, if it fits his size.

While tribal armor swapping probably won't be possible (size matters) we'll probably be able to adapt styles of other tribal armour so that it'll fit another tribe.

-> a Brudvir won't be able to wear kypiq armor but he will be able to wear armor if it just looks/is styled like a kypiq armor.

I hope that makes sense..