Lingoku.AI is a browser extension that transforms Netflix, YouTube, Reddit, and any website into an immersive language tutor by providing AI-powered instant word translations and contextual explanations, enabling natural language acquisition through comprehensible input.
What is Lingoku.AI?
Lingoku.AI is a free browser extension (available for Chrome, Edge, and Firefox) that adds an interactive language-learning layer on top of any website. It takes text and video subtitles as input and produces instant AI-generated translations and sentence-level context cards when you hover over a word. The extension works on Netflix, YouTube, Bilibili, Reddit, Twitter/X, Hacker News, CNN, and millions of other sites. No signup is required to start.
Key Features
- Comprehensible input (i+1) — AI analyzes your level and surfaces content that is just above your current ability, matching you to natural text and speech rather than artificial exercises.
- Instant context card — Hover any word while watching or reading; Lingoku explains what that word means in the exact sentence you're viewing, not just a dictionary definition.
- Smart review system — Tracks every word you've seen and resurfaces them at spaced intervals without interrupting your streaming or browsing.
- Works on 50+ platforms — Supported sites include YouTube, Netflix, Bilibili, Reddit, Twitter/X, Hacker News, CNN, and any generic website — no manual configuration needed.
- 30-second setup — Install the extension, choose your target language (English, Chinese, Japanese, Korean), and start browsing immediately. No account creation.
- AI-powered personalization — The extension adapts the difficulty of content recommendations and vocabulary review to your stated level, from absolute beginner to advanced.
Who is it for?
- Absolute beginners who want to start acquiring vocabulary from day one without studying grammar — Lingoku works with beginner-matched content and guides every step.
- Intermediate learners who have been studying for years through apps or classes but feel unable to understand real native content — this is the tool's primary use case, moving from textbooks to immersion.
- Advanced learners who already understand most of what they read/hear but want to pick up nuance, slang, regional expressions, and domain-specific vocabulary found in real-world material like Hacker News discussions or Japanese business presentations.
What can you do with Lingoku.AI?
- Watch Netflix or YouTube in your target language — hover over unfamiliar words in subtitles to get instant sentence-context translations, building vocabulary while following a story you care about.
- Read technical articles or social media — use the extension on Reddit, Hacker News, or Twitter/X to look up words in real discussions, turning casual browsing into passive language acquisition.
- Practice with any website — the extension works on generic web pages, so you can read news (e.g., CNN), blogs, or documentation in your target language and get help only when needed.
How does it work?
- Install the extension (30 seconds, no signup).
- Set your target language and current level — Lingoku adapts content difficulty.
- Watch or browse normally — the extension automatically detects your content and provides on-hover translations.
- Your vocabulary is tracked over time; Lingoku resurfaces words you've seen at optimal intervals for long-term retention.
