Keltham replies to it in Infernal with unchanging expression. "Know that you stand on territory the subject of negotiated compact witnessed by the erinyes Lrilatha, between Keltham of Elsewhere, and Asmodeus the Prince of Hell, and Otolmens the Preserver of Creation."
He is holding up a sheet of parchment inscribed with tiny Infernal letters. Abrogail can hardly crane her neck to see it, and she is no longer smart enough to memorize the contents at a glance if she could.