Plus Sharlayans are snooty scholars from a snooty pacifist nation. Of course they'd instantly embrace lost knowledge about the planet's true name.

And for some reason they are a super well respected society, I suppose due to western hemisphere aethereyte distribution. It absolutely cannot be all that previously mentioned snooty, pacifist isolationism.

But yeah, this is a setting where teleportation exists. World leaders get in the know quickly (and should really never not be in the know, since having teleporting messengers is almost as fast as email once the attunements have been done).

Dissemination of knowledge in this setting should basically make any major news proliferate at about the speed it does in the real world with the internet. I mean, I'm sure the aethernet is slightly slower, but not that much slower.