FluentAI
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The best way to learn a language is to enjoy it.

Watch what you like with dual subtitles. Click any word for the translation and pronunciation, save it, and train it with mini-games and an AI tutor.

Add to Chrome - free
youtube.com/watch?v=hillside
¡, ! ¿ ?

Look, a sailboat! Where do you think it's going?

0:00
-0:16
FluentAI showing dual Spanish subtitles on YouTube, highlighting each word as it is spoken.

One account, every surface

Your words, statuses, and review schedule live in one account — start in the extension, pick them up anywhere.

Available now

Browser extension

Dual subtitles and instant lookups on Netflix, YouTube, Prime Video, Disney+, and the open web. Chrome and Firefox.

Available now

FluentAI web app

Readers for EPUBs and PDFs, flashcards with spaced repetition, and your full word history — no install needed.

Coming 2026

Mobile app

Review your words and keep listening on the go — same account, same progress.

One word, from the show to your memory.

  1. 01

    Pick your platform

    Netflix, YouTube, Prime Video, Disney+ or HBO Max. FluentAI works on all of them.

  2. 02

    Open any video

    Watch whatever you like, the way you always do. No uploads, no copied links.

  3. 03

    Turn on FluentAI

    Click the FluentAI button in the corner of the player. Subtitles and word lookups switch on at once.

  4. 04

    Watch with dual subtitles

    The language you're learning and your own, line by line. Hover a word to see it and save it in one click.

  5. 05

    Click a word for details

    Meaning, grammar and real examples, one tab each. No dictionary tabs to juggle.

  6. 06

    Open your notebook

    Every saved word is one click away: open FluentAI from your browser toolbar and choose Notebook.

  7. 07

    Every word in one place

    Words from every show, website and book, each with its translation and how well you know it.

  8. 08

    Train with spaced repetition

    Spaced repetition brings each word back right before you'd forget it. Flashcards and the Sentence Miner are there when you want more practice.

  9. 09

    Practise with your AI tutor

    In the mobile app, an AI tutor builds conversations around the words you've saved.

Loved by serious learners

From first-week beginners to learners who switched from other tools.

Rated 5/5
“FluentAI is the best dual subtitles extension I've tried, and the team responds to feedback fast.”

Andrew Wang

Rated 5/5
“FluentAI made learning Spanish on Netflix click. Dual subs plus the AI word breakdown is exactly what I needed.”

FluentAI user

Rated 5/5
“I've been using FluentAI to learn Japanese for a few months and it's the smoothest study workflow I've found on Netflix.”

Discord community member

Frequently asked questions

Everything about platforms, languages, and how the free plan works.

Something else on your mind? Talk to us

General

FluentAI is a browser extension that helps you learn languages while watching videos. It automatically shows translations, explanations, and pronunciation guides for words and phrases in your target language as you watch content on platforms like YouTube, Netflix, Disney+, and Prime Video.

FluentAI supports all languages through our AI-powered translation system. While the quality may vary depending on the language pair, we continuously work on improving translations for all languages. The most common languages like English, Spanish, French, German, etc., typically have the highest quality translations.

As you watch videos, FluentAI analyzes the subtitles in real-time and provides interactive learning features. You can click on any word to see its translation, explanation, and hear its pronunciation. The extension also helps you create flashcards and track your learning progress.

FluentAI lets you learn from shows you'd watch anyway. You get word translations, pronunciation, and flashcard creation built into Netflix, YouTube, and other streaming sites. See how it compares to other tools.

Features

Key features include: instant word translations, detailed explanations, pronunciation guides, vocabulary tracking, flashcard creation (Anki integration), neural subtitles for better understanding, and progress analytics. Check our pricing page for a detailed comparison of features available in each plan.

Yes! We offer a free plan that lets you try out the core features. For unlimited access and advanced features, check out our paid plans on the pricing page.

FluentAI works with streaming sites you already use. You learn from real shows and movies instead of textbook exercises. When you click a word, you get translations with context from the actual scene you're watching.

Technical

FluentAI is currently available for Google Chrome and Firefox. We are actively working on Safari support, and you can submit a feature request for other browsers through our feature request page.

A mobile app is currently on our roadmap and under development. Stay tuned for updates! You can follow our progress and submit feature requests for specific mobile functionality through our feature request page.

No, FluentAI is designed to be lightweight and efficient. It runs seamlessly in the background and only activates when you are using supported streaming platforms. The impact on browser performance is minimal.

Account & Billing

You can upgrade through our website by visiting the pricing page and choosing your preferred plan. We use Stripe for secure payment processing and offer both monthly and annual billing options.

Yes, you can cancel your subscription at any time through your account settings. Your premium features will remain active until the end of your current billing period. No hidden fees or commitments.

Your next episode can teach you something.

Add to Chrome - free

Free plan · Two-minute setup · No credit card