Hey, how about I give you an easy ask to take the bad taste out of your mouth? Do you think the Jedi have their own Language? I mean the Mandalorians have Mando’a, Jewish people have Hebrew and Yiddish, Catholics have Latin, and Muslims Arabic. We know all Force wielders can communicate telepathically bc of Grogu and Nubarron. But do you think there is an ancestral or classical language either written or verbal for the 25,000 years of Jedi?
Ooof that's an old ask 😅 I only vaguely remember what the drama was that time around.
Hehhhhhhhh... I know there’s a Legends-inspired fanon conlang called Dai Bendu but I’m not super into tbh, and those examples you listed are interesting because as far as I can tell they wouldn’t actually apply to the Jedi.
I won't try to give history lessons on languages I'm only superficially familiar with, but as for the one I do know the full history of... Mando’a isn't even the unifying language it's made to be. It’s spoken all of twice in canon afaik (by Sabine in Rebels when asking to land on Krownest, and a dialect by Satine and a dying Death Watch terrorist in TCW), and even ultra traditionalists like the Children of the Watch don’t speak it onscreen among themselves. (Obviously because conlangs are a pain to get right. Not everybody can be LotR Elvish or Jason Momoa's Dothraki.) So it's only a big deal in Legends, really. Which is not to say it's not interesting, but that means I can't compare the way the Jedi Order works in Lucas' canon with the way the Mandos work in Legends.
Now for the irl languages:
Not all Jewish people speak Hebrew, or Yiddish (Yiddish is Ahskenazi, not Sephardic, for one thing) - and that Hebrew is even a living, thriving language again was a huge and conscious effort born out of extreme necessity. It's so unique that I can't compare it to anything.
Most Catholics don't know Latin (and it's a dead language anyway) and though the use of the language in liturgy started because the early churches were living under the Roman Empire and Latin was quickly replacing Greek as a 'universal' language, it carried on as a religious tool specifically to prevent expression and to further class divide. Having all holy or political texts written in a language even the small literate portion of your lower class wouldn't know was a device for control.
There are many, many Arabic dialects and not all Muslims speak them, and just like Latin, and English (and French, and Spanish, etc) the reason why so many people speak it is a tangled mess of religion, commerce, colonialism, convenience, etc.
But yes, those languages have a huge historical/religious/traditional/cultural and spiritual importance to them - but all for very different reasons, as their histories are all pretty unique. Again, I don't know nearly enough to try to say any more about them. But.
The political, religious and cultural incentives to have their own common language wouldn't exist for the Order as far as I can tell.
For one thing, because the Galaxy has its own common language. (I don't know if there's anything in Legends that gives an indication of how long Basic has been around for, but I'm assuming it's at the very least as old the Republic.) Just like the early Church didn't randomly pick Latin and Greek even though all but one of the writers of the New Testament weren't (there's good evidence that at least two of the Gospels were originally written in Aramaic of Hebrew) but used those languages because they were conveniently what everybody else could understand, the Jedi would have had every reason to use Basic as soon as it was available to them and they started to grow into an actual Order. And unlike Catholicism, the Order never grew so much that it took over the government it developed under, so Basic had no reason to become just theirs.
Would they have a language created (or resurrected) piecemeal, like Esperanto, as a way to foster unity and communication? As I said, they had Basic already - just like Esperanto was more or less a failure on account of English and a few other languages already filling the role of universal language.
And as a way to keep their more arcane/dangerous lore from falling into the wrong hands... Well, they have holocrons, and most people don't have the Force. The Order had no real reason to develop a way to keep their writings and teachings safe from outsiders - by the very nature of their connection to the Force, outsiders can't use Jedi lore. You can use holocrons to preserve your history and your culture, in a way that's much more effective than any language you could ever develop.
(Remember, Sith struggle to open Jedi holocrons and vice-versa. It's as perfect of a safeguard as you're ever going to get.)
Plus, the Jedi aren't really that concerned with being a closed group. Rather, their entire job description is opening themselves up to the Galaxy around them. They are originally diplomats, ambassadors. They have more reasons to learn the native languages of the people they help - the people they all come from - rather than to have one of their own.
What's more, in regards to the languages you cited: their cultural importance developed over centuries of shared history. Languages are transmitted through the generations, to your children and grandchildren - that's how accents and dialects come about in the first place. The Jedi are unique in that every single one of them is adopted. And so 'ancestral' just can't have the same meaning for the Order as for, say, an actual ethnic group. They start with a clean slate with every generation, so to speak - or rather, they're constantly flooding their own culture with contributions from all over the Galaxy, constantly mixing rather than being a closed circuit. Just take the iconic Jedi tunics - not only are there plenty of Jedi who don't wear them, but there are plenty of non-Jedi who have a very similar dress style (see the average Tatooine farmboy).
And basically all Jedi have different accents - which suggests that they hold on to their native languages. Even Piell and Aayla definitely don't sound like they're native Basic speakers, Obi-Wan has his own accent, Gungi or Byph don't speak Standard at all... Just like Jedi don't take away names, they don't seem to take away language. I don't think it's culturally Jedi to see being a Jedi as quite its own culture. More like, being a Jedi is a calling, a life commitment and a community, and the cultural aspects are what you bring over from your roots (which are not Jedi) and what you use to reach the people in the Galaxy who need you. Jedi, by design, are extremely multicultural - I just don't see them smoothing that over.
Even the super duper old 'Sacred Jedi texts' from the Sequels aren't just in one language:
Although...
In a sense, the Jedi do have kind of their own language after all, as you mentioned - empathy (telepathy seems to be more of a specific ability some Jedi have, like psychometry), which can't be codified into either words or written symbols, which I really like. It's much more unique than giving them a conlang that echoes to some distant origin of the Order (because as I said, they renew each other with each generation which is very special on its own) or mixes all the languages they bring with them (because, again, the point of those languages is to be focused outward, not inward).
Jedi can do what real people can't: they can speak to each other from the heart with no language actually required, and that's the greatest communication ability of them all!
Interestingly enough, the Sith do seem to have 'classical' languages for their occult rituals:
(Hey kinda like what happened with Latin lmao) But yeah, the Sith use secret languages to remain closed off and keep their lore to themselves, which isn't in the Jedi's nature. That's an interesting parallel.
Obviously this is all my very subjective interpretation. I've got an old post touching on whether or not the Jedi can be considered a 'minority' in SW and I'm gonna say more or less what I said then: they are comparable to plenty of real life groups and cultures (including many that do have their own languages), so if my take doesn't convince you, headcanon away! I couldn't find anything in support of it in the movies or TCW, but there was nothing that directly contradicted the idea either so it's a free for all!
Mostly I stuck to my guns because from a Doylist perspective while absolutely amazing when done right conlangs tend to be a fandom catastrophe. It typically reveals that most people using them have no idea how bilingualism works or how the conlang itself works (if you've read 2000-2010 era LotR fanfiction... you know. You just know) and it becomes absurd to the point of parody. And just look at Mando'a. Not using it is sometimes denounced as ooc despite its near complete absence in canon.
So yeah, tldr: subjectively, I wouldn't really want the Jedi to have one (because fandom), practically, I don't really see how they would have developed one + empathy/the Force kind of counts as its own method of communication, thematically, Jedi culture is much more focused outward rather than inward, but for funsies go crazy.
