>" However, various strands of evidence indicate that a"

Strands of evidence? My best guess would be that:

0- this is ai generated slop

1- it's using that watermarking technique

2- it's obviously detectable and degrades quality

3- it's amplified when inferencing on its own content and generates slop

>when they start inventing their own languages to secretly talk to each other so humans cannot understand, that's exactly when we are screwed

They don't have to invent brand new languages. They could use statistics to choose certain words/phrases in such a way to encode secret messages in otherwise ordinary language.