He has many additional questions. One does not however carry a pit fiend's grandeur by speaking an itemized list of your questions to Caydenspawn, not unless you are sure that it will answer you and respectfully. His pride would demand a rejoinder to any lèse-majesté, and that eventuality might not serve his Lord's interests.
Even if he won.
One exchange, however, is not beneath him.
The words that he speaks then are in Celestial. "I'll have your oath from you, Caydenspawn, to be recorded in the Library of Stygia, that this change you'd make in events is indeed in the interests of my Lord, Asmodeus; on pain of the damnation of whatever it is that you are; and as will besmirch Cayden Cailean's own honor and incur His debt to Asmodeus."