The Solamnics among you know that these barbarian tribes, certainly those of the western mountains, which have historically ranged into Gaardlund and Heartlund for pillage and plunder, are humans of Estwilde stock. More specifics are beyond you, but you can guess plenty from that.

It's sort of a DL standard to assume any barbarian tribes are human nomads. That's why did specifically state they are human, if this is your question. Unless you mean race like Solamnic vs. Estwilde, but I think this is all answered.