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There is a lot of lore from both back home, and from here as well on ghosts - sounds like this is a case of a repeater - they just repeat the last things they did before they died. I don't know if the same methods we're used to can work here, but salt might repel them, and the general method for putting them to rest is salting and burning their bones - but I doubt that would work here, especially since it's affecting people who aren't FROM here.