The leader of the squad sends a message, receives a reply. They've had very little briefing before the assault other than 'don't tip off the Lawful Neutral guy wearing weird clothes that Cheliax is Evil' which like ???? he's just seen a pit fiend but orders are orders. That Gorthoklek addressed them in Infernal may imply that he didn't mean weird-clothes-man to know that Carissa is obeying them; she also addressed them in Taldane.
"We are fairly sure that one wing was unbreached. The other option to begin clearing an area of the imperial palace for visitors. We're awaiting clarification on that." Namely hers, apparently.