This is a bit like saying that just because you spend most of the day in a pool you might not be used to the water. I seriously doubt that Trump got tongue tied because some pretty chick was translating. This would be a fail. He may have hired her for that, but I still think it would be laughably ineffective.
Better to play to his narcissism. Say some inane thing like, "Well, the intelligence folks don't tell me things like that" and hope he'll brag a leak because "Well, mine tells me everything!" oneupsmanship...
I'm sure he tried a few things. He's Putin.
Anyway, IMHO this says more about Putin than it says about Trump.