Somehow I can’t see Sprout having Hat-and-Cloak’s eloquence, and I doubt you can Imperius someone to be significantly more eloquent than their usual self.
Except through micro-managing their interactions (i.e. Quirrell(*) hiding close to imperiused-Hat-and-Cloak and forcing HaC to use a specific choice of words) – although, in that case, it would be of course be simpler for Quirrell to just play HaC himself.
Somehow I can’t see Sprout having Hat-and-Cloak’s eloquence, and I doubt you can Imperius someone to be significantly more eloquent than their usual self.
Except through micro-managing their interactions (i.e. Quirrell(*) hiding close to imperiused-Hat-and-Cloak and forcing HaC to use a specific choice of words) – although, in that case, it would be of course be simpler for Quirrell to just play HaC himself.
(*) or whoever is responsible for HaC