Maybe that's just how his language works. Maybe he's actually delivering a very philosophical speech about Galactic Federation law only applying to the poor and the marginalized, the need for him to resort to piracy, and it just comes off as a bunch of screams because Samus didn't get the auto-translate powerup.
i feel like "space pirates" as a translation for the name of an entire race is some kind of orientalism on the galactic federation's part
edit: at least specifically about the bird mantis sort of dudes who jump around and shoot "~" at you
