>>95875087
Well since Khazrak isn't born/spawned/created yet in the Old World (since the "current" date is 2276) you could flavor it as a rising beastlord who might sire or bring forth the values of what Khazrak One-Eye will aspire to be one day before the End Times?
But for some easy way to fluff beastmen, just pick a region of the map and say they are either; rampaging through the area on their way to some other place, or use the region as a long-term hunting ground where they move around locally.
Then you can add some fluff on how your beastlord and/or bray shaman unites the beastmen into a warherd and how it affects the places and locations other races uses around the region.
That's the rough outline I have for my own beastmen lore at least