I thought this video was absolutely fascinating throughout, even the ad.
The main thrust of it is about how natural Earth languages make use of idiom and metaphor frequently, and how Tamarian is subtly different from this. But we do also make use of a similar direct literary allusion, to different degrees in different languages. Mandarin has a number of examples, but we can also point to “crossing the Rubicon” as an example in English.
More recently, the use of memes has taken on a very Tamarian-like role.
OK, I found the post from daytrom I remembered, which said the idea came from a beta canon story. So I checked the Memory-Beta page for the Tamarians and it says the idea comes from a short story called Friends with the Sparrows by Christopher Bennett. I haven’t been able to find a copy of it online, though.
Thanks for finding these. I’ll check them out.