> That way lies the Sapir-Whorf hypothesis
What's wrong with it? I'm not familiar with it, but Wikipedia says "Current researchers such as Lera Boroditsky, John A. Lucy and Stephen C. Levinson believe that language influences thought, but in more limited ways than the broadest early claims".
> The value isn't about (slightly) unique ways of thinking/talking about things, but (slightly) unique ways of expressing those thoughts.
How is talking not expressing thoughts? Anyway.. Then you go on to make good points, but I don't see what makes you think they're in contradiction to anything I said. I was not talking about "the value", someone else claimed that everybody who cares about language diversity must be a nationalist, and that being a "globalist" means welcoming putting all eggs in one basket. I completely disagree with that, but for my nilly-willy reasons. If you have other reasons that's fine, they're good reasons, but to say that my view is vaguely wrong, because there lies madness for reasons you don't care to go into, well.
I personally do not care as much about what is accessible to "us" as about what is accessible to itself, wether I am aware of it or not. If there was a button to exterminate all parts of the universe we will never have access to and then forget that happened, I wouldn't press it, even if you bribed me, I hope. And again, remember this is in response to someone saying the only reason someone would care is X; I'm not saying my opinion is correct or perfect in any way, I'm just saying it's not X, cuz it's not :P