Well, it's not an actual confirmation, but a sidequest in Elpis hints strongly that at least one modern-day race was a pre-Sundering creation by the Ancients suprisingly (or not), the matanga/arkasodara (the quest is 'Terror on Two Legs', where you have to track down a creation that has gone berserk, and it turns out it's a small matanga. The end of the quest states that it seemed to be highly intelligent and that the researchers were considering giving it the power of speech accordingly).

So, assuming that creation was the origin of the matanga/arkasodara, then, potentially, all sentient races could potentially be. But again that's just assumptions on my part.