Qanaxma Deniz is pretty accepting of other nations, provided they don't do anything purposely antagonist (like HelCore). Though you are expected to follow Kisil Qanaxma laws when in Qanaxma Deniz. That means if any diplomats from a slave-owning nation bring some slaves with them, the slaves are free men as soon as they set foot on Kisil Qanaxma soil. Officially at least.