Kenku “have a talent for learning and memorizing details”, but mechanics back up mimicry, not recall. Seems…asking a Kenku for an Int check to recall sounds and phrases would be fair. Or would you just roll that into a single Deception check?

— neologiker (@neologiker) June 10, 2017

I'd go with deception to mimic something, would allow kenku to recall details without a roll

— Mike Mearls (@mikemearls) June 10, 2017