Mysterious Cheesy Escape

You walk up to the oil painting. It's a picture of a skull and quite unsettling.
Your fingers brush over it, and then to the beautifully carved frame. Just as you are about the leave the painting, you spot a tiny rusted hinge sticking out from behind it.

You unhook the hinge and the painting swings forward to reveal a small hollow space behind it. Amazed, you look inside and find: a small latin-to-english translator book. You shrug and slip the translator into your pocket.