We typically give the term Barbarian to primitive, uncivilised warriors, we also give this description to the Tortle Barbarian but it isn't truthfully as apt. Humans have a low view of Tortles as a whole and some would say that in general Tortles are primitive and uncivilised. However a Tortle Barbarian is just as smart and capable as any Tortle Warrior or Knight, they just prefer wearing less armour.