Is Language REACTOR free?

Language REACTOR has a freemium model. The free tier includes dual subtitles on Netflix and YouTube, click-to-lookup translations, flashcard creation with Anki/CSV export, EPUB/PDF uploads, and popup translator. The premium plan unlocks unlimited lookups, AI-powered phrase explanations and reformulations, grammar notes, fill-in-the-blank exercises, and advanced export options.

How much does Language REACTOR cost?

Language REACTOR's pricing is not publicly listed on the site. The premium plan features include unlimited lookups and AI assistant access. For specific pricing, you need to check the extension's page or contact support.

Does Language REACTOR have a free trial?

Language REACTOR offers a free tier with core features, but there is no mention of a time-limited free trial for premium. Users can try the free version first and upgrade to premium if needed.

What are the best alternatives to Language REACTOR?

Popular alternatives include LingQ (comprehensive with content library), Readlang (similar browser extension), Language Learning with Netflix (LLN) for Netflix, and Migaku (formerly Language Learning with YouTube). Each has different features; Language REACTOR stands out for its AI explanations and EPUB support.

Is Language REACTOR good for beginners?

Language REACTOR is best for intermediate to advanced learners. Beginners lacking structured grammar and vocabulary foundations may find it overwhelming, as it focuses on immersion through native content rather than step-by-step lessons.

Who should avoid Language REACTOR?

Complete beginners, learners preferring textbooks or formal courses, users who dislike browser extensions or want mobile-only apps, those needing full offline functionality, and learners focused on speaking or writing practice should avoid Language REACTOR.

What are the main limitations of Language REACTOR?

It is a browser extension, so no offline mode; requires Chrome or Firefox. Free tier has lookup limits. It lacks speaking/writing practice and structured curriculum. Some users report uneven quality with AI grammar notes on free tier.

Does Language REACTOR integrate with Anki?

Yes, Language REACTOR allows flashcard creation and export to Anki (CSV format), making it easy to review vocabulary using spaced repetition.

How easy is it to set up Language REACTOR?

Installation is simple: add the extension from Chrome Web Store or Firefox Add-ons. Netflix and YouTube subtitle overlays work automatically after page refresh. For EPUB/PDF upload, navigate to the reader tab. The learning curve is low for basic features, but AI features may require some exploration.

Is Language REACTOR good for learning Japanese?

Yes, it supports Japanese with dual subtitles, click-to-lookup, and AI explanations. Works well on Netflix, YouTube, and ebooks. However, beginners should have some hiragana/katakana knowledge.

Does Language REACTOR work on Netflix?

Yes, Language REACTOR overlays dual subtitles on Netflix, showing both original and translated text. Click any word for instant translation and grammar notes. Works on supported browsers with the extension installed.

What languages does Language REACTOR support?

Language REACTOR supports many languages through its automatic language detection and translation engines. It works with Netflix and YouTube content in various languages, plus it reads EPUB/PDF in multiple scripts. Specific language list not provided, but common ones like Spanish, French, Japanese, Korean, etc. are supported.

Language REACTOR

Freemium

Dual-subtitle language learning for Netflix, YouTube, ebooks & websites with AI explanations.

By Tanmay Verma, Founder · Last verified 06 Jul 2026

0 views

Added 6d ago

95/100Safe Bet

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In short

Language REACTOR — Dual-subtitle language learning for Netflix, YouTube, ebooks & websites with AI explanations. Best for Intermediate learners seeking immersion through native videos and texts, Polyglots learning multiple languages simultaneously, Self-directed learners who prefer authentic content over textbooks. Free to start; paid plans from $10/mo.

Compared withvs Surge Ai vs Reach Best vs Praktika

Is Language REACTOR actually worth it?

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Editorial Verdict

Best for

Intermediate learners seeking immersion through native videos and textsPolyglots learning multiple languages simultaneouslySelf-directed learners who prefer authentic content over textbooksFans of foreign films and TV shows who want to learn the languageAdvanced learners refining nuances via AI explanations

Not ideal for

Complete beginners who need structured grammar and vocabulary foundationsLearners strictly focused on textbooks or formal coursesUsers who dislike browser extensions or prefer mobile-only appsThose expecting full offline functionalityLearners seeking speaking or writing practice

A smart, immersion-centric tool that pairs dual subtitles with AI explanations across Netflix, YouTube, and ebooks. The free tier is generous, but mobile and complete beginners may find it less suitable.

Compare with: Language REACTOR vs Duolingo Max, Language REACTOR vs Praktika, Language REACTOR vs MaxAI.me

Last verified: July 2026

What independent users actually report about Language REACTOR

We ran a structured research pass across product reviews, community discussions, and post-purchase forum threads to surface the patterns vendors won't publish themselves. Below: the recurring strengths, the hidden costs people mention most, and the cohort that consistently regrets adopting this tool.

28 mentions across 4 sources (Hacker News, Product Hunt, App Store, Lemmy).

44% positive56% critical

Recurring strengths

+Dual subtitles on Netflix and YouTube for real-time translation.
+Hover-to-lookup words instantly with definitions and pronunciation.
+AI-powered phrase explanations and grammar notes in context.
+Customizable subtitle display (blurry, on keypress, font, color).
+Flashcard creation with Anki and CSV export for spaced repetition.

Recurring frustrations

−YouTube translation feature reportedly unstable and stops working.
−Saved files and vocabulary data can be erased unexpectedly.
−Mobile landscape mode hides subtitles, breaking usability.
−App Store reviews mention sudden paywall after initial use.
−Very sparse community feedback makes support look lacking.

Patterns worth knowing

Useful for immersive language learning via dual subtitles on Netflix/YouTube

Seen on Hacker News, Product Hunt

Reliability issues: files erased, YouTube translation broken, subtitle bugs

Seen on App Store

Customizable subtitle display (blurry, hover-only) praised by advanced learners

Seen on Hacker News

Learning curve

beginnerProductive in ~5 minutes

Hidden costs people mention

• One App Store user claims the app started charging immediately after download, suggesting a confusing trial-to-paid transition.

Viability Score

95/100

Safe Bet

How likely is Language REACTOR to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.

momentum

100

funding runway

website health

wrapper dependency

100

Last calculated: July 2026

How we score →

Key Features

Dual subtitles on Netflix and YouTube
Click-to-lookup translations and definitions
AI-powered phrase explanation and reformulation
Context-aware grammar notes
Flashcard creation and Anki/CSV export
EPUB and PDF upload with inline translation
Popup translator for any webpage
Save and review vocabulary with spaced repetition
Customizable subtitle display (font, size, color)
Automatic language detection from subtitles/audio
AI-generated fill-in-the-blank exercises
Slow playback and loop options for video
Redesigned YouTube subtitle engine with improved sync
Customizable subtitle positioning on YouTube

About Language REACTOR

FreemiumIntermediateNo APIWeb · Plugin

Language REACTOR is a browser extension that turns video streaming, ebooks, and any webpage into language learning tools. It overlays dual subtitles on Netflix and YouTube, letting you see both the original and your native language simultaneously. Click any word to get instant translations, definitions, and grammar notes—powered by AI for context-aware explanations and reformulations. The tool also supports EPUB/PDF uploads with inline translation, a popup translator for web browsing, and flashcard creation with spaced repetition exportable to Anki or CSV. Beyond subtitles, the AI assistant (using models like GPT-4) can explain phrases, generate fill-in-the-blank exercises, and adapt to your learning level. A recent update redesigned the YouTube subtitle engine for better timing accuracy and customizable positioning, making immersion smoother on that platform. Language REACTOR is best for intermediate to advanced learners who want to learn through authentic content rather than structured courses. Its free tier offers robust core features, while premium unlocks unlimited lookups, the AI assistant, and advanced export options. Compared to dedicated apps like LingQ or Readlang, it uniquely combines video, reading, and web in one extension, though its mobile support is limited to the browser.

Behind the Verdict

Language REACTOR excels at turning passive video consumption into active learning. If you're an intermediate learner who wants to pick up vocabulary and nuance from native content—especially shows on Netflix—this extension is hard to beat. The dual-subtitle overlay with click-to-lookup is immediate and friction-free. The AI assistant adds context-aware explanations and exercises, bridging the gap between watching and studying. However, complete beginners will struggle: there's no structured curriculum, grammar drills, or speaking practice. The extension works only in browsers, so mobile use means using a mobile browser, not a native app. Compared to LingQ, Language REACTOR offers better video integration (native Netflix/YouTube subtitle sync) but lacks LingQ's library of curated content and community. Readlang is a lighter alternative for web reading, but Language REACTOR's video support is unique. The free tier is generous enough for casual learners; premium pricing was last seen at $10/month but may have changed. We'd reach for this when binge-watching foreign shows—every subtitle click is a vocab save. Where it bites: no offline mode, no mobile app, and the AI assistant's quality depends on the underlying model (GPT-4), which may feel slow for some.

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Use Cases

Watch Netflix with dual subtitles to pick up new vocabulary while enjoying shows
Read an EPUB book with instant word translations and AI-generated chapter summaries
Practice pronunciation by looping clips on YouTube with subtitles on
Export flashcards from your viewing sessions to Anki for spaced repetition
Get AI explanations for idioms or cultural references you don't understand
Generate custom fill-in-the-blank exercises from your saved sentences

Models Under the Hood

GPT-4

Limitations

The free tier caps at 100 saved flashcards and a limited number of daily AI queries.
Advanced AI features like customized exercises and PDF upload require Premium ($10/month).
It works only as a browser extension (Chrome/Firefox), no mobile app, and requires an active internet connection for AI features.

12-month cost

Project the real annual outlay, including the implied monthly cost when only an annual tier is published.

Plan

Annual total

Free

Over 12 months

Effective monthly

Free

Billed monthly

Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.

Integrations

NetflixYouTubeAnkiCSV

Resources & Guides

Frequently Asked Questions

Tools that pair well with Language REACTOR

Common stack mates teams adopt alongside Language REACTOR, with the specific reason each pairing earns its keep.

Duolingo Max

Premium AI-powered language learning with GPT-4 roleplay and tutoring.

Praktika

AI-powered tutors for real-time language conversation practice

MaxAI.me

Multi-model AI sidebar for reading, writing, and translating on any webpage

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