Using a made-up language like Klonoa or Monster Hunter is the most likely scenario, since it means they wouldn't have to dub it into fifty other languages. They already started using a fake language for text for that reason.
https://youtu.be/nl_boPm9WjE?si=TQmGcvz8-DsQkJR9&t=117A good voice actor will be able to convey tone just fine even when speaking gibberesh, and different characters can even have different phenomes present in their "language" to give them a different feel.
