A few days before the Ys IX localization/Switch port announcement in the New Game Plus expo, someone posted this to 4chan:
Initially, the only announcement that this predicted correctly was Ys IX. However, recently
Switch ports of Cold Steel I/II and Zero & Ao no Kiseki Kai were announced for Japan/China/Korea, which somewhat lines up with the Zero/Azure Switch port mentioned in the post.
The fact that Zero and Azure's PS4 rereleases were not only announced, but
released weeks before that leak was even posted (Azure in May and Zero in April) gives me some level of doubt.
Trails of Cold Steel III's Switch version was also released in Japan since March, with the localization coming out about a few days after that leak was posted. And ToCS IV's localization was announced back in April for both PS4 and Switch.
It's possible that the leaker could be using already known information and use the "someone messaged this a while back" excuse to cover that up because I think it's weird that most the stuff that isn't Smash didn't just come true, but did so
before the leak was even posted.
Ys IX being localized could be a guess since Falcom has been localizing their games a good amount recently, from what I heard.
In other words, hype responsibly. Don't assume it's a guarantee, but speculating about a Falcom rep is still a nice breath of fresh air, so let's keep doing that