tirlia: Hai, Kasuma-desu~
Depends on the kind. To begin with, tolkiens orcs aren't pigs.
The ones spelled ork [in english] were iirc warhammer 40k ones? Or were they orcs too? I know there was some well-known IP that used Ork's instead, at least.
Tolkien's orcs aren't indeed, and actually more like goblins as usually depicted.
The pig-orc is a Gary Gygax invention for DnD.
The "k" spelling is used in 40k, but the orks there are more ape-like.
As usual, the words (orc(k), goblin, troll) are so old it can't be IP'd .... The looks/background, however....