I dunno why /gig/ is so hung up on the whole "When the God of War shares this secret with the Traveler" thing.
>Mavuika: I will answer you honestly, but you must help me keep this a secret.
>Mavuika: I can use the power of the Gnosis to save Natlan, but it comes at a heavy price.
>Mavuika: The Gnosis would drain all the souls and memories from the Night Kingdom and weave them into a giant net, which would surround the Ley Lines and protect them against Abyssal corrosion.
>Mavuika: The Night Kingdom not only houses the souls of the dead, but also our memories and legends. Using the Gnosis means converting all three into material for the net, erasing our history and culture.
>Mavuika: Natlan is unique among the nations of Teyvat. Given the ever-looming threat of the Abyss, the Pyro Archons had to account for the worst case scenario.
>Mavuika: Still, this has always been a well-kept secret. I'm very curious how The Captain learned this information...
(...)
>(Traveler): (The Pyro Archon just shared an important secret with us, and she seems sincere. Figuring out The Captain's supposed new way of saving Natlan is the key...)
The game literally states this is the secret THREE times in the same conversation. All that was left was for Paimon to repeat it a forth time while looking directly at the players' direction. Was it an underwhelming secret? perhaps, but it's still consistent with what the Travails trailer told us.
>what about the Gemstone censored name
The censored name has 3 letters and the gemstones are always referring to the region's Archon. Given that they're 1.0 items and the beta pyro-archon name was Aym, one can assume Aym is the censored name (Aym is an alternative spelling of Haborym). Natlan has a lot of censored names because the whole theme of the region is manipulating history to gaslight the present.
Alternatively, wait for Natlan to actually end (gnosis with the Fatui) so we can be sure of it.