Ya, at least there's enough there there (despite the paucity of canon) to communicate and be creative; eg
https://sites.google.com/view/tinglangbelta/xom — Oh Stewardess, I speak Belter.
He's in great pain and wants to know if you can help.
— Tili natet 'ratna. Im gonya leta-kom *mediting
detim im bek fo du to gut.
I believe Tolkien's languages remain the "gold standard", but I'm not sure if they're as productive for everyday chat and memes.
(I have heard that Eliezer Ben-Yehuda made a big mistake in not creating any swear words for Modern Hebrew, leading to a substantial overlap in comprehensible swearing between jewish and arabic communities in J'lem. That said, I understand "chinga tu madre ... cabrón" perfectly well, so probably any language communities in close contact will swear at each other perfectly comprehensibly whether they share a vocabulary or not)