Or... You could read what I wrote and sensibly determine it to be what it was intended: Indicating cultural misunderstandings/translation errors resulting in the natives of Oligarch being referred to as Orcs.
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I don't think that was ever intended. The Oligarch name predates BattleMaster, and the whole Sirionite>Elf thing. I am fairly certain that Oligarchians were referred to as orcs simply because Sirionites wanted to be elves, and, well, the obvious enemy of the elves are the orcs.
I highly doubt it was well. This is what I've always heard.