Learn Esperanto
Esperanto · constructed language · Lemmatizer: Wiktionary
Esperanto (Esperanto) is one of 60+ languages Laesi supports. Import EPUBs, subtitles, or web articles, look up every word, track your vocabulary by knowledge level, and export curated cards to Anki — all in a desktop app that runs entirely on your machine.
What the big apps miss
A reader that supports Esperanto
Most reading apps stop at a dozen mass-market languages. Laesi supports 60+, and Esperanto is one of them — not as an afterthought, but as a first-class language with its own vocabulary database.
Surface-form lookup · full lemmatizer planned
Esperanto uses Wiktionary surface-form lookup today — every word you click is looked up directly, and a full morphological lemmatizer is on the roadmap.
Pay once, own it
No subscription, no cloud, no meter. Laesi is a one-time purchase that runs locally — your texts and vocabulary stay on your machine.
Features, for Esperanto specifically
Every Laesi feature works for Esperanto. The reader, the dictionary panel, the browser extension, and Anki export don't change from language to language — only the analyzer behind them does.
See everything Laesi does →-
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Reader with knowledge-level highlightingPaste text or open a book; every word is colored by how well you know it.
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Import books & subtitlesEPUB, MOBI, AZW3, DOCX, TXT and SRT/VTT/ASS/SSA subtitles — read with per-chapter stats.
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Wiktionary + Google lookupOne click fetches a definition; save only the senses you need.
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Anki exportQueue words while reading, export as tab-separated cards.
More from World languages
Start reading Esperanto today.
One-time purchase. Mac, Windows, and Linux. 30-day refund.