The Pærthian pun somewhat holds up in English. The long protest sign reads: ZTUODTDREHJ KWNI KAINLATGAM!
(Zthoo-OHDZ-th-DZREH-hh-j KUH-nee kyne-LAHT-gkahm)
or “War-heads out of School!”

heit (heh-eet) is a general word for rodents, but it’s particularly common to refer to squirrel-like beings smirking when their mouths are full. Sonia may be implying that Wyle is gloating.

uveez (OO-veez) literally means “beak” and is a derogatory word for the talking heads of government.