Quote Originally Posted by Averax View Post
Not to ruin your backstory thing, but the Green Word isn't actually a voice in one's head. It's just the name they have for their laws.

Like we have the constitution, they have the green word. It's basically the "don't interact with anybody from outside of these woods unless you reallllly have to" law
There is definitely something about them hearing the voice of the forest and losing the ability if they leave, whether that's what's termed the Green Word or not. It's probably in the sidequests around Fanow.