Dump some of the alien-tech from the Bolo series on them, that or borrow from the more "serious" animes (the ones where they at least bother to explain a hand-waved technology). In that way, one could use somewhat-familiar terms and explain the resemblances to the fact that the Grathnik have influenced popular culture "just in case" so the could on occasion crash-land at some fangirl's house with some prospect of getting native-assistance.