This might not make it into the current update but... Would it be possibly to add something that allowed distinguishing literacy and speech to the languages characters know?
Campaigns in Dark Sun make this an important distinction because sorcerer-kings keep literacy out of the hands of the "common" people lest they learn the truth of their history and rise against their overseers.
How does this work in Dark Sun - does each one count as a separate language? Or is it up to the player to say "I know Common, but I can only speak it, not write"?