That's because, once upon a time, the people whom owned the animals weren't the people whom butchered them. So the pig was owned by a saxon who spoke english, but butchered by a french speaker. So a pig got cut up into PORC chops.
In Volcano's case it isn't so much a case just of amazon or eBay sellers... it looks like rather than releasing it directly, Fox licensed it out to Starz/Anchor Bay, and it's subsequently gone out of print
thought about buying volcano on bluray last night, until i saw the price on amazon: $135. the used ones arent much cheaper at $90. i know the 3p sellers can set any price they want, but come on. $90-$135 for a 20 year old movie that was only so-so?