Oh, the west - the one past the Yawning Gorge - is not generally barbaric compared to the eastern lands in Kirirak... in fact Junica, while with a markedly differently structured heirarchy and foreign norms, is probably just as civilized as Rodoria, and even the Xhurl-njok (when referring to the Xhurl-njok as a people one can omit the "spryne"-part, as it refers to individuals within the race rather than the race as a whole), though sociopathic, are relatively civilized. Being warlike does not rule out being civilized (I could draw inappropriate parallels to countries from Earth, but in the name of peace it's probably better that I don't), and even if the western lands are almost perpetually at war with each other, they do generally have the common sense not to pick a fight with someone they can't defend themselves against, and unless there are significantly more nomadic Éireannach than I envision there being and that these were somehow capable of rallying as a combined force at very short notice, the Xhurl-njok would probably be too much of a mouthful for them. The Xhurl-njok are frighteningly powerful, if you recall, especially when there's even just several of them working together; the main reason they haven't been destroyed by the other western countries is that no single other western nation commands enough power to challenge them like that, and due to them being constantly at war with each other they haven't managed to band together to fight them. After all, the Xhurl-njok may attack them once in a while, but so does every other country around them.
...Of course the Éireannach could just avoid conflict with the Xhurl-njok altogether and that would solve most of the problem; then instead of having a pissed-off Xhurl-njok empire at their neck, determined to eradicate them, they would just have to endure occasional skirmishes when they felt bold enough to move against them.

And I did indeed envision the del-korm as being further south than even the Sekalyn, though probably not by much; their culture is less of an issue than the way it and their general properties is described, namely as coming from contending with creatures not present in northern lands. The race itself could probably exist in the west, but the circumstances they live under would fit better with either the south or off the shores of Kirirak somewhere.