There have been a few recent threads in the HBO forum about a remark that musicmeister Marty The Elder O'Donnell made at the E3 fanfest regarding Covenant Elite taunts . Basically, he said they were in the POA level but would be near impossible to find.
Surreptitious thinks he may have found them, and recorded a number of Elite vocalizations in the POA level.
Marty has since confirmed that Surreptitious did, indeed, find one of the taunts-- c'mon, tough guy but also said that there are others.
All I ever remember hearing (aside from the standard, backwards-Sarge dialog) was lousy piece of crap , which was the only thing I ever heard them say in English. And no, I don't have it recorded. But I know I heard it.
Louis Wu, of course, posted this at HBO.