BTW have you heard about Metal Gear Solid or The Sapir-Whorf Hypothesis?
It is interesting all that you attach. I had not heard of that hypothesis as such, although if I share that idea, like you to the weak version, in fact, thinking about that was one of the causes of the post.
I also thought about adding something to the terms in Sanskrit. It seems interesting to me that when a society progresses in philosophical fields, it begins to create new terms to represent the new conceptions that they have created (discovered). Such is the case of the northeastern Indians of the Vedic period, or of the ancient Greeks of the classical period.
Fortunately nothing is truly lost forever. If something is lost, it just take more time for another person to discover it.
I think the same, although losing a word means a huge delay, because not only does it mean that society is in decline, but it must also take a long time after having passed its decline to recover that word again. If a word represents a true concept, however much it is lost, it will always be recovered, since it is not a human creation, like false concepts, but rather a human discovery, therefore it exists independently of these.
Language is certainly a very interesting topic to reflect on.