Watching True Blood episodes several times and reading this wikia I've come to notice that nearly all Spells in True Blood are in a different language, which make them sound cool, but not really mean something complex, some seem more like Marnie commanding her brainwashed vampires and not really spells on their own. Now, other ones deserves the tittle of spells like the Sun Barrier, the vampire controling and memory erasing spells, and those made by Jesus to summon his inner demon, but the one that states "kill the king", sounds like an order, no conjuration.
I want to state that I do not know exactly the policy to write a spell, I just share my thoughts with you... so, what do you think? anything said by a witch in a language different from english in Season 4 is actually a spell?... SHARE!!