Lexxio · Esperanto
Learn Esperanto the way Esperanto actually works.
La lingvo konstruiĝas el pecoj. Nun ankaŭ la aplikaĵo.
Not a generic course with Esperanto swapped in. Lexxio teaches the roots, prefixes and suffixes, shows you how regular the grammar really is, and then gives you real books to read, read aloud in voices Esperanto has never had before.
Free: the whole course and every book. Permanently, not a promotion.
juna
young
1 words built so far
Free for Esperanto
Esperanto is free on Lexxio. And it's staying that way.
Every lesson in the course and every Esperanto book is free. Esperanto is a permanent part of Lexxio: not an experiment, and not a launch promotion that quietly ends.
- Every lesson: both parts, all 28 units, every story and every drill
- Every Lexxio Original in Esperanto, two borrowed at a time
- Permanent. It stays, and it stays free
What costs money is what costs us money to run: the AI features, like Talk and translating your own books.
Why free?
I love the idea of Esperanto, and I am still learning it myself. Opening Lexxio up to this community is the best thing I have to give it. It helps the people learning, it helps a cause I think is worth helping, and it helps the app grow.
How Esperanto actually works
Invent a word. Find out it's real.
Esperanto's real strength is that words are built, not memorised: a few hundred roots, a handful of prefixes and suffixes, endings that never lie, and grammar with no exceptions. So the course teaches the pieces. This is one of its drills: a description, a tray of pieces, two of them decoys. The answer is always a real word nobody showed you.
Word 1 of 5
A place where you cook
It remembers pieces, not just words
Once you know mal-, jun-, -ul- and -o, the app knows you can read maljunulo. The course, its stories and the reader's known-word highlighting all share one rule for what you can build.
Every piece gets its own lesson
The first time -in- shows up, the word grows on screen: vir·o becomes vir·in·o, and both voices say it. Then the piece is asked on its own, swapped, split and built.
Two parts, 28 units
Part 1 is the sounds, 496 words and the pieces. Part 2 is the grammar, 14 units from past tense to participles, in the order La Blua Pordo needs them. By the end, nothing the book leans on at its Natural level is untaught. Every lesson is free.
Learn 780 words. Read 1,322.
The course teaches you 780 words. La Blua Pordo uses 542 more that it never teaches, and you can read every one of them, because they are made of pieces you already know.
780
words the course teaches
542
more you can read anyway
Never taught. Already yours.
fot·il·o
camera
photo + tool
kaf·ej·o
café
coffee + place for
mal·jun·ul·in·o
old woman
opposite + young + person + female
Counted by the app from the book's own text, each form a word takes counted once, using the same rule the course uses to decide what you can build. After Part 1 alone: 496 taught, 352 more.
Read aloud
A story book, cast like a radio play.
Press play. This is a real page spread from the unit 8 story, with the app's own recordings: Klara tells it, and the woman, the man, the boy and the seller each have their own voice. The highlight follows the audio, word by word.
En la urbo
Basics, unit 8 · 4 of 10 pages
Press play and follow the words
26 story books, all narrated
One per unit, written only from words you can already read or build, and voiced like a radio play: every character has their own voice.
Every course word, twice
Each word is recorded in a woman's voice and a man's, and the speaker alternates. Hearing a second voice say it teaches more than the same clip again.
Whole books, read to you
In the reader, pick a voice and listen to any Esperanto text with each word lit as it is spoken. The six neural voices run on phones as well as computers, and work offline once downloaded.
Also included: Spomenka, the RHVoice voice of the writer Spomenka Štimec, free software under the GPL.
Something to read
Every Lexxio Original gets an Esperanto edition.
Modern, polished fiction in Esperanto is hard to come by. So every short story Lexxio publishes is published in Esperanto too: seven today, and every new one from here on. Each is graded from Simple to Faithful, so the same story meets you where you are, and all of them are free to borrow.
The Blue Door
En Esperanto
Salvage Rights
En Esperanto
Under a Broken Sky
En Esperanto
Apartment 307
En Esperanto
Three Offers
En Esperanto
When the Tide Returns
En Esperanto
The Wall of the World
En Esperanto
The next one
Every new Original arrives in Esperanto too.
Reading one and something sounds off? Report it from inside the book. That is how these get better.
See the OriginalsA serious place to read
Not just a beginner course. A reader for Esperanto.
One moment from La Blua Pordo, straight out of the app, at three reading levels: Simple, Natural and Faithful. Switch levels, toggle the optional ending colours, and tap an underlined word to pull it apart.
Mi tenas la fotografion. Vi bone konas ĝin; vi min teni ĝin mil fojojn, ĝis la anguloj fariĝis molaj kaj la brilo tie, kie mia lernis kuŝi.
La Blua Pordo, chapter 1. Text and word builds exactly as they appear in the app.
eluziĝis
wore away
verb, past (-is)
«Ĉiu vorto, kiun mi konkeras, estas ĉambro en domo, en kiun oni neniam lasis min eniri.»
Every word I conquer is a room in a house I was never allowed to enter.
The dictionary names the ending
Not "past of promesi". The app resolves the form to its root and says what the ending is doing: to promise, past (-is).
Roots explained by words you own
Never met dika? You learned maldika. So the app glosses dik- as "as in maldika (thin)" and lets you do the last step.
Any book you bring
Import your own EPUB or text in Esperanto and the same lookups, flashcards and read-aloud work on it.
The grammar path
La tabelvortoj, as a machine instead of a chart.
The correlatives, which Esperantists call tabelvortoj, "table words": kio, tio, kiam, neniam and forty-one more. Forty-five words, or really five beginnings times nine endings. The course calls it the question table, fills it in piece by piece, and then makes you play it. Touch a cell. Tap to hear it.
Touch a cell to see what it is made of. Tap to hear it.
| ki-which, what | ti-that | i-some | ĉi-every | neni-no | |
|---|---|---|---|---|---|
| -othing | |||||
| -uone, person | |||||
| -akind | |||||
| -eplace | |||||
| -amtime | |||||
| -elway | |||||
| -alreason | |||||
| -omamount | |||||
| -eswhose |
Drills for the things every learner gets wrong
-n or not
In the house, or into the house? en la domo against en la domon, until the -n of direction stops being a guess.
sia or lia
His own, or someone else's? The reflexive gets its own unit and its own drill, because no table ever fixed it.
Participle build
-ant-, -int-, -ont-, -at-, -it-, -ot-. Built from tiles, the passive ones first, because the book uses them more.
The grid
The correlatives as a board. Two columns at first, then all five by nine. Find the cell the sentence needs.
Speak
It can tell ĉambro from cambro.
Esperanto is spelled exactly as it sounds, so a slip is a spelling. Accent Check weighs what you said against the word and against each slip an English speaker makes with it, and points at the letter.
ĉambro
Heard c where ĉ belongs.
Example takes, spoken by the app's voices. Press one to hear it. In the app it is your own voice, scored on your device, and the recording goes nowhere.
The slips it listens for
ĉ said as c or s. c said as s or k. ĝ as g. ĥ as k or h. ŝ as s. aŭ flattened to a or o. A silent k in kn. A dropped h. Each one measured, and the ones the recognizer cannot catch are left out instead of faked.
Talk, in Esperanto
Ten scenes, from En la kafejo to En la apoteko. You speak, your device hears you, a character answers aloud. What you say never leaves the device. Rather type? The x-system works there too.
Speak a flashcard
Cards can ask you to say the word instead of tapping it. The same recognizer decides whether you did.
Typing
Type cx. Get ĉ.
No keyboard to install. The x-system works wherever you type Esperanto in the app: answers, search, the dictionary, the glossary, Talk, Translate. Paste it and it converts. Answer with cxu and it is still right. Try it.
Click the field and type your own.
Counted from the app
The numbers, since you will check.
Every figure here is counted from the app itself, not from a roadmap.
7
voices that read Esperanto aloud
Six neural voices, Klara, Lidia, Vera, Ludoviko, Petro and Emilo, and Spomenka, the RHVoice voice of the writer Spomenka Štimec.
Up to 5
reading levels for every Original
The whole Originals catalog launches in Esperanto: fiction written for learners, graded from Simple to Faithful. Move up a level and the same chapter grows with you, until you are reading the book as written.
On device
speech recognition that hears Esperanto
The big speech engines skip Esperanto. Lexxio runs its own recognizer on your machine, a model trained on the voices Esperantists gave to Common Voice.
780 → 1,322
words taught, words you can read
The course teaches 780 words. Because it teaches their pieces, you can read 542 more in La Blua Pordo that nobody taught you. The app counts them.
45
correlatives, as a grid you play
The words Esperantists call tabelvortoj. Five beginnings, nine endings. Taught as a system, drilled by tapping the right cell, and every one of them spoken aloud.
Over 4,000
dictionary entries, offline
Levelled by the Akademio's Baza Radikaro Oficiala, and by pieces: lernejo is exactly as hard as the harder of lern- and -ej-.
Side by side
What you are used to, and what this is.
The usual
Lexxio
Vocabulary taught one word at a time, like any other language
Pieces taught, tracked and counted. The app knows what you can build
The affixes and correlatives as tables to study
As animated lessons and drills: build, split, invent, tap the cell
A robotic voice, or none at all
Seven voices, stories cast per character, words lit as they are read
Nothing listens to you
On-device recognition, slip-by-slip pronunciation, spoken conversation
A course, then you are on your own
A course that ends inside a novel, then every Lexxio Original at your level, then any book you import
Install a keyboard first
cx becomes ĉ wherever you type Esperanto
For polyglots
Your Esperanto tools come with you.
Esperanto is rarely anyone's only language. When you pick up the next one, nothing here has to be relearned: the same graded books, the same read-aloud, the same tap to look up and the same flashcards work in eighteen other languages, from Spanish to Mandarin. Each language keeps its own library, so nothing bleeds between them.
With the community
Esperanto speakers: help us make it better.
You know this language better than any app ever will. If you speak it well, you can make Lexxio better for everyone who comes after you.
Report it from any screen
Every screen in Lexxio has a Report an issue button. Reports are read, and what you catch gets fixed.
- A translation that reads awkwardly
- A word said wrong
- A gloss or a word split that is off
- Anything else a fluent reader would wince at
Every Esperanto edition goes through several translation and editing passes before it ships. Then it meets people who actually speak the language, and nothing replaces that.
Be first through the door.
Join the waitlist and we'll email you the moment Lexxio is ready to read. Anticipated late Fall 2026.