How Literate are your D&D Worlds?

[Amechra]

I'm guessing you're using "fluent" to mean "literate" (rather than simply fluency) in the latter cases?

Fun fact about my setting — two of the human languages in the area where the campaign is happening have no written form, including the native tongue of the ruling class. Of the other three languages, two of them share the same written form and the last one has two different ways of writing it.