Master English While Watching Netflix & YouTube
No flashcards. No grammar drills. No habit changes. Just install Lingoku and every video you watch, every article you read, becomes an English lesson that actually sticks. AI-powered hover translations explain words in context — so you learn real English, not textbook English.
✓ 30-second install ✓ No sign-up ✓ Free basic plan forever
Lingoku method
Immersion learning loop
Read in context
Unknown words stay inside the sentence you found them in.
AI explains nuance
Meaning, usage, and tone are interpreted from the full line.
Review at the right time
Saved words come back before they fade from memory.
YouTube · Netflix · Reddit · Twitter/X · Hacker News · CNN · Medium · Any website
Lingoku runs as a browser extension — no app switching, works instantly on every platform you use.
Turn YouTube & Netflix into your personal English tutor
See a word you don't know in the subtitles? Don't pause, don't screenshot, don't open a dictionary. Hover over it — in 0.2 seconds, AI tells you exactly what it means *in this sentence*. Whether 'run' means sprinting or managing a company, the AI reads the context and gets it right every time.
Works with YouTube captions, Netflix subtitles, and any video platform with text — learn from what you actually want to watch.
Zero disruption
Hover to translate — no pausing, no app switching
Context-aware AI
Distinguishes polysemy — 'bank' as riverbank vs. financial institution
One click saves any word — AI handles the memorization
Found a useful expression? Click once. Lingoku generates a complete flashcard: the word, the original sentence, AI's context-specific explanation, and pronunciation. No manual organizing. No Anki setup. Our spaced repetition algorithm resurfaces words right before you'd forget them — you just enjoy the content.
One-click save
Instant flashcard with full context, no typing needed
Smart review
Spaced repetition reminds you at the optimal moment
Reddit, Hacker News, Medium — every page becomes an English lesson
Not just video. Lingoku works on any webpage with English text. Reading Hacker News? Unknown words auto-highlight. Scrolling Twitter? Slang and idioms get explained inline — what they mean, when to use them, who says them.
Lingoku remembers words you already know and stops highlighting them. Only true 'i+1' words — slightly above your level — get surfaced, so your reading flow never breaks.
Works everywhere
Any English website — news, blogs, social media, docs
Smart filtering
Only shows words you actually need to learn
Why Lingoku actually works
Decades of linguistics research back this up: real-context acquisition beats rote memorization every time.
Comprehensible input (i+1)
You acquire language best from content slightly above your level — not too easy, not too hard. Lingoku's AI identifies exactly which words are your i+1, keeping every session in the optimal zone.
Context memory beats flashcards 3:1
Words encountered in real sentences — in shows you care about, in articles you actually want to read — have 3x better long-term retention than isolated vocabulary drills.
Spaced repetition fights the forgetting curve
Lingoku tracks every word you encounter. It resurfaces them right before you'd forget — moving vocabulary into long-term memory instead of today's-learned-tomorrow's-gone.
Why vocab apps feel like work — and Lingoku doesn't
Not another tool. A completely different approach.
Real learners, real results
Feedback from Chrome Store and Discord community
"Spent three years on and off with Duolingo, DuChinese, vocab apps — nothing stuck. Two months with Lingoku and I'm reading Hacker News without reaching for a dictionary. The method actually makes sense."
Marco Silva, Software Engineer
Marco Silva
Software Engineer
"I need to read dense academic English every day. Lingoku's hover translation means I never break my reading flow. After a month, I was genuinely surprised by how many fewer words I needed to look up."
Yuki Tanaka, PhD Student
Yuki Tanaka
PhD Student
"Watching Netflix has secretly become study time. The AI explanations are so much better than subtitles — it tells you why a word was used, not just what it translates to. My listening comprehension has jumped noticeably."
Anna Kowalski, Marketing Manager
Anna Kowalski
Marketing Manager
"The best part is I literally don't feel like I'm studying. I browse Reddit, watch YouTube — same as always. But now when I see an unfamiliar word, I just hover and instantly get it. Three weeks later, I know those words without hovering."
Carlos Mendez, Product Designer
Carlos Mendez
Product Designer
"As a translator I'm very critical of language tools. Lingoku's AI context analysis impressed me — same word in different sentences gets completely different, accurate explanations. Something local dictionaries simply cannot do."
Sophie Laurent, Freelance Translator
Sophie Laurent
Freelance Translator
"I learn best by doing, not studying. Lingoku lets me 'do' English — read real things, watch real content — and learn from it. My investors noticed my English pitch improved significantly in two months."
James Park, Startup Founder
James Park
Startup Founder
Questions you might have
Everything people ask about learning English naturally with Lingoku.
Start learning in context
Your next YouTube session is an English lesson waiting to happen
Change nothing about your habits. Just install one extension. Keep watching, reading, scrolling — Lingoku quietly builds your English vocabulary in the background.
✓ Free basic plan forever, no credit card
✓ 30-second install, start immediately
✓ Works on YouTube, Netflix, Reddit & 50+ platforms
✓ AI-powered, never stores your browsing content