Child of a Metal God

That gets into the question of what defines a language. I'm pretty loose about it, personally. English is whatever English speakers speak. While I recognize that most of our irregular plurals are loan words, I can't consider them foreign. They're not pronounced with a non-English accent, you don't write them in italics, no one thinks you're being pretentious for working them into a conversation. Etymology is fun, but it doesn't really mean anything. It's descriptive, not predictive.