The 20 Most Interesting Fictional Languages Ever Created
Some invented languages have more active learners than real human languages. Klingon has had a translated Hamlet since 1996, and there are Na'vi speakers who never set foot on Pandora's film set. The most interesting fictional languages aren't just set dressing — they are the moment a story leaks out of the screen and into real life.
This list covers the 20 that matter most: how complete they are, who built them, and what makes each one strange. And yes, you can try almost all of them right now.
The Counterintuitive Truth: The "Best" Fictional Language Isn't the Most Complete
You'd expect the most famous fictional languages to be the most fully developed. They're not. Tolkien's Quenya has deep grammar and huge vocabulary, yet the language most people actually quote is Minionese — which has almost no rules at all.
What makes a fictional language stick is narrative load: how much emotional work a single phrase does inside the story. "Valar morghulis" carries a whole philosophy of death in two words. "Bello!" carries pure joy. Completeness earns respect from linguists. Narrative load earns fans.
We ranked with both in mind.
The Heavyweights: Fully Usable Languages
1. Quenya (The Lord of the Rings)
J.R.R. Tolkien started inventing Elvish languages around 1910, decades before The Hobbit. Quenya is the "Elf-Latin": formal, Finnish-inspired, heavily inflected. It's the language of "Namárië", the lament Galadriel sings.
Try it: Quenya Translator
2. Sindarin (The Lord of the Rings)
The everyday tongue of the Elves of Middle-earth, modelled on the sound patterns of Welsh. "Mae govannen" (well met) is Sindarin. Most Elvish you hear in Peter Jackson's films is Sindarin, not Quenya.
Try it: Sindarin Translator
3. Klingon (Star Trek)
Built by linguist Marc Okrand for Star Trek III (1984), then published as The Klingon Dictionary in 1985. Its default word order is object–verb–subject, which is extremely rare among human languages — that's deliberate alienness.
Try it: Klingon Translator
4. High Valyrian (Game of Thrones)
David J. Peterson expanded a handful of George R.R. Martin's phrases into a full language with four grammatical genders, and nouns that change form by case and number. It gained a second life in House of the Dragon.
Try it: Valyrian Translator
5. Dothraki (Game of Thrones)
Peterson's first HBO language, built in 2009 from about 56 words in the books. By the end of the show it had a vocabulary well over 3,000 words.
Try it: Dothraki Translator
6. Na'vi (Avatar)
Paul Frommer built Na'vi with ejective consonants like tx and kx — sounds English doesn't have but that humans can learn. The community dictionary now exceeds 2,000 words. We covered it in depth in our Na'vi language guide.
Try it: Na'vi Translator
The World-Builders: Languages That Define a Culture
7. Dovahzul (Skyrim)
The dragon tongue of The Elder Scrolls V. Every word doubles as a "Shout" of power, and its 34-letter runic alphabet was designed to look like dragon claw marks.
Try it: Dovahzul Translator
8. Mando'a (Star Wars)
Karen Traviss built Mando'a for her Republic Commando novels, and it was later picked up by The Mandalorian. It has almost no grammatical tense — fitting for a culture that lives in the present.
Try it: Mandalorian Translator
9. Black Speech (The Lord of the Rings)
Sauron's engineered language, used for the Ring inscription: "Ash nazg durbatulûk". Tolkien made it deliberately harsh — lots of gh, z and sh.
Try it: Black Speech Translator
10. Vulcan (Star Trek)
Less developed than Klingon on screen, but home to one of sci-fi's most famous phrases: "Dif-tor heh smusma" — live long and prosper.
Try it: Vulcan Translator
11. Draconic (Dungeons & Dragons)
The oldest spoken tongue in many D&D settings, and the root of most magical words. Tabletop players have used it in campaigns for decades.
Try it: Draconic Translator
12. Huttese (Star Wars)
Sound designer Ben Burtt based Huttese partly on Quechua, an Indigenous language of the Andes. That's why Jabba sounds oddly human.
Try it: Huttese Translator
The Strange Ones: Languages That Break the Rules
13. Tamarian (Star Trek: The Next Generation)
A language spoken entirely in references to myths: "Darmok and Jalad at Tanagra." The words are easy to translate, but you can't understand the meaning without knowing the stories. It's the purest example of context-locked language in fiction.
Try it: Tamarian Translator
14. Simlish (The Sims)
Deliberately meaningless, so players project their own emotions onto it. Pop stars have re-recorded hits in Simlish for the games.
Try it: Simlish Translator
15. Parseltongue (Harry Potter)
A language only certain wizards can speak. In the films, it was built by processing actors' voices — a language defined as much by sound as by words.
Try it: Parseltongue Translator
16. R'lyehian (Lovecraft)
"Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn." Lovecraft wrote it to be almost unpronounceable — the language itself is the horror.
Try it: R'lyehian Translator
17. Kryptonian (Superman)
Superman's home language has been re-invented more than once, with its own alphabet designed for Man of Steel (2013).
Try it: Kryptonian Translator
18. Minionese (Despicable Me)
A cheerful mash-up of Spanish, French, Italian, Japanese, and food words. Almost no grammar, but instantly understandable in any country.
Try it: Minion Translator
19. Groot (Guardians of the Galaxy)
A vocabulary of exactly three words — "I am Groot" — where all the meaning is in tone. It's the far end of narrative load.
Try it: Groot Translator
20. Enderman (Minecraft)
A reversed and distorted sound language. Many players recognise it before they recognise any other fictional language.
Try it: Enderman Translator
What Separates a Great Fictional Language From a Gimmick
Looking across all 20, two patterns show up:
- Consistency beats size. Tamarian has little vocabulary but perfectly consistent logic. Audiences sense rules even when they can't name them.
- A language needs a culture. Dothraki words for horses and Klingon words for honor work because they show what each people cares about.
David J. Peterson has said in interviews that a language should feel as though it has a history beyond the screen. That's the test every entry here passes in its own way — even Groot.
Where Fictional Languages Are Heading
Expect the next wave of famous conlangs to come from games rather than films. Games like Skyrim already ask players to use a language, not just hear it. Within the next decade, we predict at least one major game will teach a playable fictional language as a core mechanic. Learning it will be part of beating the game.
Streaming series are also getting longer, so creators need more dialogue in their invented languages. That pushes studios to hire professional conlangers from the start instead of adding gibberish in post-production.