The planet looks like an ideal spot for colonization from a distance. Covered with a range of biomes, from lush forest to long coastlines to roaring rivers. However, when the Amentans arrive they quickly notice anomalies on their scans.
A population of humanoids lives on the planet, scattered - sometimes individuals are spotted alone and other times they appear in groups of up to a few thousand. They appear similar to child Amentans, except for a general lack of bright hair colors. Civilization appears primitive - in some cases so primitive that it's confusing how they survive at all, with small groups managing to survive in environments as harsh arctic tundra huddled around campfires, in sandy villages in a desert with a single well. A small number of cities exist, most without obvious sources of sufficient food to support them.
As the Amentans investigate further they notice more anomalies of a far less consistent nature. There's an aurora in the northern hemisphere that shines continuously, day and night. One of the cities appear to change subtly in composition and position constantly, with no obvious construction visible. A group of the humanoids appear to live underwater, alongside a gigantic manta ray, hundreds of feet in breadth. A giant skeleton statue of green crystal seems to be moving. A blur of feathers and wings zooms across the planet like a missile at one point. Except for the humanoid species, none of the anomalies repeat.
These are just the anomalies they notice easily from orbit, more may be found on closer inspection.
The spoken monster that the other Amentans communicated with, the Amaliens struggle to convey. A few of them get distracted by dipping their feet in the ocean and watching the sand wash off their toes, but refocus on the first contact mission after a bit.
...well, if they want to supply the landing-camp linguists with more vocabulary they can work on that.
They work on that with more focus then the wave jumping girl did. They focus on building up enough language to explain to the Amentans that some of the other Amentans in the sky ship would do a better job of communicating due to something that was transmitted to them earlier.
They don't know! And they're sort of confused and worried because the ... they struggle to communicate... The transmitted thing is alive somehow.
The Amaliens nod and looked relieved at having been understood. Except for the tired looking boy who just looks a bit more nervous than before.
The amaliens don't know if it's been noticed and are quite worried for it! It doesn't seem dangerous to them?
The tired looking Amalien glares at them a bit more.
Well, they can tell the people up there that the locals think that a living thing has gone to the ship from the surface somehow? Does it go through places without air?
Yes it does and yes they should tell them! And, the tired boy adds, they should transmit it back here fast.
(They do take a bit of discussion among each other to figure out whether it transmits through places without air, but conclude that it does)
They radio up with this pronouncement.
They get a response back that really puzzles them. They are somewhat at pains to figure out how to ask the locals "is it a language that is also a person".
After some more bewildered conferencing they give the amaliens a spare everything and have it connected to one of the linguists, who says, "I'm sorry, we didn't know that it couldn't exist in multiple places!"
The Amaliens play around with the words the linguist said, deconstructing them and trying to say new words aloud (giggling when they sound funny) and figuring out what sounds natural, quickly reederiving the language.
After a bit of internal discussion, one of the amaliens says in the language "Cryptophasia can't be in places 'less they can communi-cate with each other. It'll still stay in both places s'long as we can talk to you."
The Amentans on the beach will start figuring out the language just from overhearing all this, but might have to think a bit to learn it.
The greens who have been studying Cryptophasia want to ask some questions about it now that they can talk to people who aren't it. They're currently mostly not communicating with the rest of their ship because it was really frightening how it did... magic?... to them; they think it's cool and it hasn't done anything hostile but they would really want to know more about how it works before letting it spread to all the Amentans even once. (The camp Amentans move off so they can't hear the conversation.)
It is unique and special and can do things and exist in a way that is all its own? Cryptophasia is a very friendly monster, though it doesn't have a very special companion friend like some do. It's also really extro-vert-ed so it likes being spoken by lots of people. The amaliens were guessing the spaceship was a monster too but maybe it's not?
They built the spaceship out of metal that came from underground and on asteroids and stuff.
Oh. That sounds really hard! The Amaliens (except for the tired boy) look impressed and the one with the wooden sword looks at them with awe and excitement in her eyes.
It was really hard and took them a long time to figure out, yeah! If it's okay with the amaliens the research team would like to wrap up the things they were doing to study the Cryptophasia - they can keep the phone line open and talk about it while they do that, but preferably out of earshot of the landing team - so they can make a determination about whether they want to recommend using it for general communications with locals.