As far as I'm aware, the only significant bit of changed dialogue based on race currently is from talking to a guard in the 3.0 Hildibrand quests if you're a Lalafell. He just mentions hearing rumors that they can't be trusted normally, but if you're a Lalafell, he'll talk about how popular Tataru was at the Forgotten Knight before mentioning the rumors, but backpedals and says he doesn't believe any of it (In a very unconvincing manner) when he remembers he's talking to one.

I'd like to hope that the Au Ra in Othard will acknowledge you in some way, though. Extra points if it varies based on what clan you are, because historically, there's supposed to be some tension between the Raen and Xaela.