James Jacobs wrote:
Race traits and racial traits, despite similar names, are different things.
Racial traits are the abilities you get for being a race, like darkvision or stonecunning. Those are locked in and cant be swapped around.
RACE traits are a category of character trait that, like regional traits and religion traits, appear regularly in the Pathfinder Companion line. You'll want to check those books out for the various race traits you can swap out for by taking the Adopted basic trait. If you don't have or don't use Pathfinder Companion products, then just ignore the Adopted trait because it does nothing for you.
But stonecunning IS swappable as of Advanced. So how can you say Darkvision isn't allowed, when harder to explain traits, like Dwarven Magic Resistance IS allowed? I understand the difference between Race traits and Racial traits, however no-where in any of the books I've seen differentiates this. In fact, it lists everything under racial traits in the books, even the stat adjustments and size, which are OBVIOUSLY race traits. If just being adopted by dwarves could qualify you for magic resistance.. Why then couldn't darkvision?