You could, if they'd only gotten the lyrics right, or even half right. As it turned out, they were not even close.
That's what current language experts say anyway.
They have studied that language for years now, but some say they're not even close to understanding it.
And no, they're not talking about the cavemen, they know that language. It's the thrash death metal they just can't get a grasp on according to close sources.