Alright! [Grinning, he held an arm around her to support her, then gestured at the dolphins.]

It's kind of adapted language, since our vocal chords can't produce the exact sounds. But dolphins still understand it, and we're able to communicate just fine. Now, repeat after me, 'kay?

[And looking back at Fluttershy he makes a short series of noises, going slowly enough that she can, hopefully, mimic them.]