Ever since I discovered the semantic branch of metaethics, it struck me as strange that this is even something to be argued about from the armchair.
Isn't this something you get the answer to by going out and asking people in different places/languages what they mean when they make various moral claims? It just seems that once you have all that data, you have all the facts. What else is there to say about semantics?
So I've gathered that in philosophy of language, the typical response to this is that a language is considered a practice that's "out there", and it has its own internal rules and logic, so even if someone takes themselves to be e.g. noncognitivist about moral claims, they could in principle be wrong about that.
So if English was someone's second language, they might say "Would you like to enjoy us?", intending to say "Would you like to join us?". I know what they meant, but I would say they misspoke. This does seem to give ammo to the idea that there's a right and wrong way to speak a language regardless of intent.
But it seems to me that when we call something wrong semantically, we're really just saying it's nonstandard. In principle, it could be considered correct if it grew in popularity enough, and AFAIK that has in fact happened in many ways.
Take for instance "literally". In my life, I've seen this word come to take on arguably the opposite of its original meaning. Nowadays, people might say "I'm literally dead". I can only interpret "literally" here to mean "figuratively". 25 years ago, that would just be considered wrong. Now, I'm not so sure, it at least has some colloquial traction.
But ultimately, I think what language boils down to is just speaker intent and listener interpretation. And the things we call "correct" or "abiding by the language logic" are really just shorthand for "common enough to be understood whatever percent of the time". The weird thing about the rules is that it's not like changing the rules in a game of basketball, where it happens between games or seasons and all the teams get to look over the revised rulebook. Language rules just change in real time and nobody signs the dotted line. We either understand each other or we don't.
The thing that strikes me as super weird about metaethical cognitivism, is that AFAIK this just isn't something that is taught in English and there are no established rules about it. When we teach people English, we don't have on the checklist: [metaethical cognitivism]. So it seems that this topic is anyone's best guess, with no way of resolving it, if you're not going to treat it as an empirical question about what percentage of people intend this or that, and go survey people.
This has led me to being, I guess a quietist on the topic and I'm just wondering if any experts can shed light on what I might be missing.