Learn French from Netflix & YouTube — Click Any Word to Translate
DeepLingo's Chrome extension turns every French video into a vocabulary lesson. Click a word on the subtitle, get an instant translation with IPA and examples, and save it to your DeepLingo vocabulary for spaced-repetition practice.
Free tier always free. Extension Plus — unlimited translations + cloud sync + post-watch quizzes — is $6.99 CAD/month ($59.99/year), included free with any DeepLingo subscription. Pre-launch users get free Extension Plus through 2026-07-22.
What you get
Built specifically for French learners preparing for TCF or TEF Canada — and anyone who learns vocabulary best in context.
Works on Netflix & YouTube
Native captions are replaced with clickable ones. Click any French word for an instant translation popup with IPA, examples, and grammar notes.
Synonyms & antonyms with CEFR levels
Every word card shows synonyms and antonyms tagged A1–C2, so you instantly see which alternatives match your level. Click any chip to navigate to that word with a back arrow — explore vocabulary like a graph, no extra search.
Native French pronunciation
55,000+ native-speaker audio clips from Wikimedia Commons play with one tap. Combined with IPA, you hear and read the pronunciation of any word you click — no extra service or API key needed.
CEFR difficulty badges (A1–C2)
Every word in the bundled dictionary is tagged with its CEFR level using open corpora plus LLM enrichment for long-tail vocabulary. Know at a glance whether a word is foundational A1/A2 or advanced C1/C2.
Saves to your DeepLingo vocabulary
Saved words sync to your DeepLingo account with show title, timestamp, and source URL — ready for spaced-repetition practice on the web app. Known words fade in the overlay so new vocabulary visually pops out.
Transcript sidebar
Press T to open a searchable transcript of everything spoken in the video. Click any line on YouTube to seek to that moment. Synonyms and CEFR badges appear inline in the transcript too.
Bundled dictionary + Chrome translator fallback
83,000+ French entries with synonyms, antonyms, audio, and CEFR work offline-first. Anything missing routes through Chrome's on-device translator (Chrome 138+) — fast, private, no API key.
Private by default
Telemetry and crash reports are opt-in and off by default. We never collect subtitle text, video URLs, or anything you click.
How it works
Three steps from install to your first saved word.
Install from the Chrome Web Store
One-click install. Works on Chrome, Brave, Edge, and other Chromium browsers.
Sign in to DeepLingo (optional for free tier)
The free tier works without an account — translations and saved words live in your browser only. Sign in (or sign up for Extension Plus at $6.99/mo) to sync vocab across devices and unlock post-watch quizzes.
Open a French video
Go to any French YouTube or Netflix video, enable French captions, and start clicking words. Translations appear instantly — no typing.
How DeepLingo compares
Other tools cover writing or general language learning. DeepLingo is built around French video and the TCF / TEF exams.
| Feature | DeepLingo | Language Reactor | Lingopie | Grammarly |
|---|---|---|---|---|
| Click-to-translate French subtitles on streaming video | ✓ | ✓ | ✓ | — |
| Works on your own Netflix and YouTube subscription | ✓ | ✓ | — | — |
| Synonyms and antonyms graded by CEFR level (A1–C2) | ✓ | — | — | — |
| Native French pronunciation audio for vocabulary | ✓ | ✓ | ✓ | — |
| Saved-word spaced-repetition practice | ✓ | — | ✓ | — |
| French writing grammar and spell-check | — | — | — | ✓ |
| Designed around TCF / TEF Canada exam preparation | ✓ | — | — | — |
| Free tier available | ✓ | ✓ | — | ✓ |
| Paid plan starting price | $6.99 CAD/mo (or $59.99 CAD/yr) | ≈ $5 USD/mo (or ≈ $40 USD/yr) | ≈ $12 USD/mo (or ≈ $67 USD/yr) | $12 USD/mo billed annually ($30/mo monthly) |
Comparison accurate as of May 2026, based on publicly available information from each provider's official website or Chrome Web Store listing. Features and prices can change — we review this table quarterly. Each tool solves a slightly different problem: Language Reactor and DeepLingo overlay your own Netflix and YouTube subscription; Lingopie is a separate video library with its own player; and Grammarly checks the grammar of text you write. DeepLingo is the only one of the four built specifically around TCF / TEF Canada vocabulary and the only one that grades synonyms and antonyms by CEFR level.
Trademarks and product names belong to their respective owners. This comparison reflects features and prices publicly advertised by each provider and is not endorsed by them.
Who it's for
TCF / TEF Canada candidates
Build vocabulary in context from real French media — the same vocabulary the listening and reading sections of TCF and TEF draw from. Saved words flow into your DeepLingo practice queue.
French immersion learners
Watch what you'd watch anyway. The extension turns Netflix and YouTube into a vocabulary feed — fade out what you know, expose what you don't.
Express Entry & Francophone Mobility applicants
Reach CLB 5 (B1) for Francophone Mobility or CLB 7 (B2) for the 50-point French CRS bonus. Vocabulary breadth is the single biggest predictor of TCF/TEF reading and listening scores.
FAQ
Is the DeepLingo extension really free?
How is this different from Language Reactor?
How is this different from Lingopie?
What are CEFR-graded synonyms and antonyms?
Does this work as a Grammarly alternative for French?
Which platforms does it work on?
Do I need an account to use it?
What data does the extension collect?
Will my DeepLingo subscription cover Extension Plus?
Start learning French from what you already watch
Free tier always free. Extension Plus $6.99/mo (3-day trial). Two clicks to install on any Chromium browser.
Privacy and data practices: extension privacy policy.