Open Lingo review
A focused, free web app for deep study of Japanese, Korean, and Spanish.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Open Lingo is a free, open-source language-learning web app for learners who want structured study in Japanese, Korean, or Spanish. Its hand-authored courses combine lesson content with spaced-repetition reviews, speech recognition, handwriting practice, grammar drills, recorded audio, and an adaptive placement test. The product is especially suited to learners who prefer a focused curriculum over a broad language catalog and who want access to MIT-licensed software that can be self-hosted.
The Free plan costs 0 and includes structured courses, spaced-repetition reviews, speech recognition, handwriting practice, grammar drills, and the MIT-licensed source. Open Lingo’s standout learning depth comes from how it handles practice: FSRS-6 scheduling supports personalized review, while separate recognition and recall tracking distinguishes understanding a word from producing it. Speech recognition supports pronunciation practice, animated stroke order and handwriting verification support writing, and grammar drills cover particles and conjugation. Together, these features make the app more than a basic flashcard tool for learners working through a defined course sequence.
The main trade-off is focus. Open Lingo offers three languages and runs on the web, so it is a better fit for concentrated study than for learners seeking a large multilingual platform or a current native mobile experience. Spanish is described as live and early, which may matter to learners looking for a more mature course. Choose Open Lingo if free access, open-source software, structured learning, and detailed review mechanics matter most. Choose an alternative if you need broader language coverage or a native mobile app today.
Open Lingo pros and cons
- Where it wins
- Structured courses combine grammar, audio, writing, and pronunciation.
- FSRS-6 separates recognition and recall for personalized review.
- Open-source, MIT-licensed software can be self-hosted.
- Where it doesn't
- Coverage is limited to Japanese, Korean, and Spanish.
- The current product is web-only; the native mobile app is in progress.
- Spanish is live but described as early.
Open Lingo fact sheet, pricing and score →
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