I've always been told they couldn't, no. And when you're used to it, they're actually pretty easy to understand. But it sounds like Floette figured out a way to do it anyway! [Mavis sounds so proud of her Pokemon.

A little shy voice can be heard in Mavis' background.] I didn't do anything special. [Floette leans over Mavis' shoulder and waves gently at Erza.] Hi, Erza!

[Mavis nods and frowns slightly at the same time.] I find it hard to believe that a single individual could be behind all of this. ...If so, they have to be one of the most powerful wizards I've ever met!