Well, generally I think "abstract and generic" is the obvious way to go, and I think is usually the done thing - I think the very US-specific tests on yourmorals are from studies that were originally only done in the US and are as abstract and generic as they needed to be in that context. The possibility that tending not to understand abstract, generic questions is a culture-dependent trait seems like a really tricky problem, although in some contexts you might just compromise with e.g. "you pastor, or if you are not religious then someone you trust similarly, tells you..."