Ancestors, since they’d be far more likely rationalise my bizarre present-day manner as being possessed by demons or something to that effect rather than assuming I’m from half a millennium in the future, I can’t say I have any specific guesses as to what the society of 2523 might look like, but I suspect that they’d be far more likely to jump to the somewhat improbable sci-fi explanation of time travel (or perhaps some other technological explanation like mind malware if brain implants become a thing) than assuming supernatural explanations of demons or witchcraft.
Not necessarily; there are a few SNES games in the Switch Online library that weren’t localised and hence remain untranslated from Japanese, namely Super Puyo Puyo 2, Panel de Pon, Mario’s Super Picross, and Kirby’s Star Stacker. Though all of those games are puzzle games, which don’t necessarily need language to be enjoyed, whereas an RPG like Mother 3 would likely be much less enjoyable without understanding the dialogue, battle UI and so on.