Webcomic Deer Rectory

I think the outstanding Paranatural cipher question is what the hell the skull-talk means.

It looks like a slightly more complex cipher where a set of characters might correspond to a single letter. I don't think there is a big enough sample size to brute-force it. The comic suggests that you learn one word of it at a time, so it seems reasonable that the character pairs would be letters and not individual words. You can't encode that much data with just those two symbols, not unless there's a very short list of words we're not privy to, which seems uncrackable.

I tried googling it and nobody's come up with it yet.

It could possibly be a book code, with the first skull being a page number and the second one being a word number. Then the question would be, what book? Something suitably demonic/murdery?