# Lingoku.AI

> Lingoku is an AI-powered browser extension that turns videos and websites (YouTube, Netflix, Bilibili, Reddit, Hacker News, BBC, etc.) into a language-immersion tutor. It adaptively replaces portions of content with your target language, matches material to your level (i+1), offers instant explanations and spaced-repetition review, and supports Chinese, Japanese, and Korean. No login or credit card required; bring your own API key.

Lingoku focuses on "acquisition" (contextual exposure) rather than rote memorization. Key features include intelligent difficulty matching (i+1), instant feedback and explanations, contextual sentence-level learning, and spaced repetition based on forgetting-curve principles. The extension is available for major browsers and integrates with common content platforms so you can learn naturally while watching or browsing.

## Install / Extensions

- [Chrome extension](https://chrome.google.com/webstore/detail/pmiebjobnadehkmjgkbkapkcbkmjefkg): Free to install, no login required
- [Edge add-on](https://microsoftedge.microsoft.com/addons/detail/daakemebbojkiphanehgofkofpdkofai): Edge browser support
- [Firefox add-on](https://addons.mozilla.org/zh-CN/firefox/addon/lingoku-ai/): Firefox support

## Learn Languages / Getting Started

- [Home / Learn Languages](https://lingoku.ai/): Main site and product overview
- [Learn Chinese](https://lingoku.ai/learn-chinese): Chinese learning page
- [Learn Japanese](https://lingoku.ai/learn-japanese): Japanese learning page
- [Learn Korean](https://lingoku.ai/learn-korean): Korean learning page
- [Home / Learn Languages](https://lingoku.ai/zh-CN/): Main site and product overview
- [Learn English](https://lingoku.ai/zh-CN/learn-english): English learning page
- [Learn Japanese](https://lingoku.ai/zh-CN/learn-japanese): Japanese learning page
- [Learn Korean](https://lingoku.ai/zh-CN/learn-korean): Korean learning page
- [Home / Learn Languages](https://lingoku.ai/ja/): Main site and product overview
- [Learn English](https://lingoku.ai/ja/learn-english): English learning page
- [Learn Chinese](https://lingoku.ai/ja/learn-chinese): Chinese learning page
- [Learn Korean](https://lingoku.ai/ja/learn-korean): Korean learning page
- [Home / Learn Languages](https://lingoku.ai/ko/): Main site and product overview
- [Learn English](https://lingoku.ai/ko/learn-english): English learning page
- [Learn Chinese](https://lingoku.ai/ko/learn-chinese): Chinese learning page
- [Learn Japanese](https://lingoku.ai/ko/learn-japanese): Japanese learning page

- [Pricing](https://lingoku.ai/pricing): Pricing and plans
- [About Us](https://lingoku.ai/about): Company and mission
- [Changelog](https://lingoku.ai/changelog): Product updates and release notes

## Platforms & Features

- [YouTube integration](https://lingoku.ai/): Works with YouTube (described on main site): Replaces/subtitles/inline content to expose target language
- [Netflix / Streaming support](https://lingoku.ai/): Streaming/video integration (refer to site for supported platforms)
- [Reddit / Hacker News / Any site](https://lingoku.ai/): Replaces portions of web content across many sites for contextual learning

## Blog & Resources

- [Blog - View All Articles](https://lingoku.ai/blog): Tips, theories, and resources for language acquisition
- [Duolingo Stock Crashed 80%: Is AI Really Killing Language Learning?](https://lingoku.ai/blog/duolingo-stock-crash-ai-language-learning)
- [Why Your Chinese Birthday Message Might Be Insulting (Without You Knowing)](https://lingoku.ai/blog/happy-birthday-in-chinese)
- [The Awkward Truth About Saying Hello in Chinese (And How to Avoid It)](https://lingoku.ai/blog/hello-in-chinese)
- [How to Say Hi in Chinese: What Happened When I Got It Wrong](https://lingoku.ai/blog/how-to-say-hi-in-chinese)
- [Why I Couldn't Count in Korean for 6 Months (And the Numbering System Nobody Explained)](https://lingoku.ai/blog/numbering-in-korean)
- [How to Write Hello in Chinese: 你好 vs 您好 Explained](https://lingoku.ai/blog/how-to-write-hello-in-chinese)
- [Mandarin of Hello: What It Actually Means & How to Use It](https://lingoku.ai/blog/mandarin-of-hello)
- [How to Say Yes in Japanese: 7 Ways to Agree Like a Native](https://lingoku.ai/blog/yes-japanese-language)
- [5 Free AI Language Learning Tools That Actually Work (2026)](https://lingoku.ai/blog/free-ai-language-learning-tools)
- [2026年真正有效的5款免费AI语言学习工具](https://lingoku.ai/zh-CN/blog/free-ai-language-learning-tools)

## Legal & Policies

- [Privacy Policy](https://lingoku.ai/privacy): Privacy details
- [Terms of Service](https://lingoku.ai/terms): Terms and conditions

## Contact & Community

- [support@lingoku.ai](mailto:support@lingoku.ai): Support email
- [Discord](https://discord.gg/khRPkVTPNW): Community and support
- [X (Twitter)](https://x.com/LingokuAI): Social updates

## Optional

- [Affiliate](https://lingoku.ai/affiliate)
- [Tools - How long to learn chinese calculator](https://lingoku.ai/tools/how-long-to-learn-chinese)
- [Tools - How long to learn japanese calculator](https://lingoku.ai/tools/how-long-to-learn-japanese)
- [Tools - How long to learn korean calculator](https://lingoku.ai/tools/how-long-to-learn-korean)
- [Tools - How long to learn english calculator](https://lingoku.ai/zh-CN/tools/how-long-to-learn-english)
- [Tools - How long to learn japanese calculator](https://lingoku.ai/zh-CN/tools/how-long-to-learn-japanese)
- [Tools - How long to learn korean calculator](https://lingoku.ai/zh-CN/tools/how-long-to-learn-korean)
- [Tools - How long to learn english calculator](https://lingoku.ai/ja/tools/how-long-to-learn-english)
- [Tools - How long to learn chinese calculator](https://lingoku.ai/ja/tools/how-long-to-learn-chinese)
- [Tools - How long to learn korean calculator](https://lingoku.ai/ja/tools/how-long-to-learn-korean)
- [Tools - How long to learn english calculator](https://lingoku.ai/ko/tools/how-long-to-learn-english)
- [Tools - How long to learn chinese calculator](https://lingoku.ai/ko/tools/how-long-to-learn-chinese)
- [Tools - How long to learn japanese calculator](https://lingoku.ai/ko/tools/how-long-to-learn-japanese)

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Generated by Lingoku.AI