I’ve been wary of @RainbowKun for a while. There are some things that looked a bit off, and I did check for plagiarism quite a few times without rendering any results. Nevertheless, I still has the cross-language + spin possibility on a conceptual sticky note at the back of my mind.

There’s the fact that some of the OP type posts, present a vocabulary that is way more complex in construction than that used when replying to quoted fragments of other people’s posts. On a complete different scale at times.

I noticed a certain groupie effect on some of his threads (all included in OP’s list of suspects). My hypothesis is that they are all friends and such, working towards a common objective of creating a name on the forum, to launch his (Rainbow) DAO project shortly. The strategy is fine if playing by the book, but this thread is questioning whether the play is legit or foul (i.e. meriting alt accounts, or friend accounts for the sake of being friends and working towards a common goal), and whether content was partially built through intended cross-language + spinning techniques. @nutildah’s post above seems to exemplify the latter clearly in a sample case.