Lua is active — hover any highlighted word
Now available on the Chrome Web Store

Learn Français
while you browse

Lua highlights words as you read — like saudade in a Portuguese essay, or ikigai in a piece about Japanese philosophy. Hover any word to translate it in context. Keep browsing, keep learning.

Add to Chrome — Free See how it works ↓

No account required · Works instantly · Free forever

50,000+
Active learners
4.9 ★
Chrome Web Store
50+
Languages
2M+
Words learned
How it works

Three steps to fluency

No separate study sessions. Lua fits into the browsing you already do.

1
Install & Choose a Language
Add Lua to Chrome in under a minute. Pick from 50+ languages — French, Spanish, Japanese, Mandarin, and more. No signup, no configuration. Just install and go.
2
Browse Like Normal
Lua highlights vocabulary as you read — like a curious flâneur through a foreign language. Hover any word to see its translation, definition, and pronunciation instantly — without leaving your tab.
3
Review & Remember
Lua tracks every word you encounter — from Weltanschauung to the simplest greeting — and schedules spaced repetition reviews at exactly the right moment. Nothing slips through.
Features

Built on learning science

Every feature is grounded in research on how humans actually acquire vocabulary.

AI Contextual Translation
Goes beyond the dictionary. Lua understands idioms, slang, and cultural nuance — giving you the meaning that fits the sentence, not just the word.
Context-aware translation
"There's a real joie de vivre here." → An exuberant enjoyment of life Not: joy of living (too literal)
Spaced Repetition Reviews
Lua tracks every word you encounter and schedules reviews at the optimal moment — right before you'd forget it. Based on the Ebbinghaus forgetting curve.
Your review queue
saudade Review now
ikigai Tomorrow
Weltanschauung In 3 days
Works on Any Website
99% site compatibility — news, Wikipedia, Reddit, YouTube subtitles, Medium, blogs. If you can read it in Chrome, Lua can teach from it.
NYT ✓
Reddit ✓
Wiki ✓
YouTube ✓
Medium ✓
+ more
Native Pronunciation
Hear every word spoken by a native voice. Learn not just what it means, but how to actually say it — with phonetic guides and audio on demand.
sprezzatura
/spret.tsaˈtu.ra/ · noun, Italian
Pricing

Simple, transparent pricing

Start free. Upgrade when you're ready to go deeper.

Free
$0
forever
50 words per day
5 languages
AI contextual translation
Spaced repetition
Pronunciation (TTS)
Progress analytics
MOST POPULAR
Pro
$5
per month
Unlimited words
50+ languages
AI contextual translation
Spaced repetition
Pronunciation (TTS)
Progress analytics
Testimonials

Loved by language learners

Join thousands who learn languages through their everyday browsing.

"The day I hovered hygge in a travel article and actually felt what the word meant — not just a translation, but the whole concept — something clicked. That's when I knew this was different."
Sarah K.
Danish learner · 3 months
"I read Japanese news every morning. Concepts like wabi-sabi that I'd heard about but never truly grasped became real through context. 400+ words in two months."
Marco R.
Japanese learner · 6 months
"Lua showed me duende — that ineffable quality of raw artistic inspiration in Spanish — right in an article about flamenco. I felt the word before I understood it. I don't think about studying anymore."
Priya M.
Spanish learner · 4 months
Get Started Today
Start learning
Français today.
Free forever. No account needed. Works on any website.
Add to Chrome — It's Free
50,000+ users 4.9 on Chrome Web Store No credit card needed