Do Au Ra have Forked Tongue

[Raminax]

From what little can be made out no, this is not the case. I have not seen anything odd when my character opens her mouth and none of the quests deal with Au Ra physiology (well, DRK at least).

Neither the White Mage or Ninja questlines for Heavensward mention any quirky Au Ra traits regarding physiology either. Honestly, they really don't explain much of either Au Ra physiology or culture, besides reinforcing the fact that being Xaela (or Au Ra in general, ambiguous wording ahoy) apparently sucks.

I read somewhere that we're of demon descent not lizards, snakes or dragons.

Keyword being motif. Meant to invoke the imagery of demons, rather than being descended from them.