Another suggestion: Sumerian.
It has the added benefit that a cuneiform sign can have even over 100 meanings so sentences can be formed such way that they have several different translations. I can recall something I heard/read somewhere their texts frequently were drafted so they have a layer of naughty stuff in it. Liek:
"En-Lil went to the beach of the lake" can also read as "En-Lil had wild sex with the XY goddess".
Sadly I can't give a source.