User blog comment:DE-Note/New Character?/@comment-24891101-20151024041808/@comment-4010415-20151024050427

Y'know, they kind of made a point to tell us at least twice that the Vytal Festival will show us the cultures of the other kingdoms.

Weiss, in The Stray: "A festival dedicated to the cultures of the world!"

WoR: Vytal Festival Tournament: "Every two years, a Kingdom would be chosen to open its doors to the world, allowing citizens from every corner of Remnant to meet and indulge in one another's cultures."

So, they actually do have an opening to do some world building.