Nope. Not that I know of. Just the usual characters. Do I have to reach a certain part of the game to have them show up?That's bizarre. Did you have C.J. show up two weeks ago for the Fishing Tourney? Did Flick show up for last month's Bug-Off?
Unless your clock isn't to the right date, the only possible reason I can think of for the event not happening is that you're still early in the game. Have you recently started playing? Have you completed the tutorial yet by having K.K. come to your town? If that's not it, then I've got nothing for you.
Yeah, I wasn't really counting that as "in-universe" since it's essentially an options menu. Wouldn't really make in-universe sense for your character to dial up Rover and ask him to make everyone speak a different language. I was more referring to actual character dialogue.
I'm at the part of the game where I've gotten the ladder and I'm working on more future residents houses.