@The Mad Hatter I'm pretty sure I said "Kederak, the southern continent" a couple of times in the history section. In any case, once the map is finished it will be much easier. With physical drawbacks and such for mixed breeds I honestly haven't given it much thought. I would imagine that they would be fertile though because the Orlvan exist because of multiple generations of mixed breeding. If you want make a mixed character I'll leave it up to you when it comes to physical differences and I'll just make sure they don't seem to ridiculous.
As for racism it can be said that many of the other races resent human rule. Humans are seen as assholes who take whatever they want, elves are snooty jerks who think they are better than everyone or are hippies. Dwarves are unintelligent brutes, Orcs are barbarians who only want to kill and enslave people and Orlvan are a bunch of fanatic nutjobs either due to Castus being an Orlvan or Estlam starting in Orderak. (The middle east)
Does that answer your question?