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LingTube
Learn languages from YouTube and Netflix videos
Dictionary lookups often give the wrong meaning when a word has several senses. LingTube uses the subtitle line and part of speech to give the meaning used in that sentence. It also adds part-of-speech colors with furigana and pinyin, grammar breakdowns with CEFR levels, transcription for videos without captions, shareable timestamped notes, danmaku on YouTube and Netflix, and AI Q&A that knows the video. YouTube chapters, heatmap and Shorts still work.
Hi Product Hunt 👋
I'm Dylan, the maker of LingTube.
I've found that learning a language through videos I actually enjoy works better than anything else I've tried. It never feels like a chore, and what you pick up is the language people really use every day. Compared with textbooks and traditional language apps, it takes less effort and I learn more.
The problem was the workflow. I kept pausing videos to type words into Google Translate and paste sentences into DeepSeek for grammar explanations. Google Translate handles full sentences well, but with single words it often picks the wrong meaning when a word has several senses, because it ignores the context and the part of speech. And the words I looked up that way, I forgot almost right away.
So I built LingTube to fix that. Along the way I ran into more problems: some YouTube videos have no captions, or captions that are wrong. There was no way to take notes at a specific timestamp, or to discuss a moment with other learners. Netflix had no bullet comments (danmaku) to interact while watching. And general AI chatbots couldn't answer my questions about a video, because they didn't know what was in it. LingTube now solves each of these.
Here's what it does:
🔤 Context-aware word & phrase translation
Tap a word or select a phrase, and LingTube sends the current subtitle line along with it. The translation is picked for how the word is used in that sentence, using its part of speech and base form, instead of listing every dictionary meaning.
🎨 Automatic part-of-speech tagging, furigana and pinyin
Every subtitle is analyzed with language-specific NLP. Words are color-coded by part of speech, Japanese kanji get furigana, and Chinese gets tone-marked pinyin.
📊 Grammar breakdowns and CEFR levels
Ask for a grammar analysis of any sentence. Words you save are tagged with an estimated CEFR level (A1–C2), so you can see where your vocabulary actually sits.
🔁 Review what you saved
Saved words and sentences go into review cards that link back to the original video moment, and you can export them to Anki.
🎙️ Transcription for videos without captions
No subtitles, or bad ones? LingTube transcribes the audio with Whisper and translates it into your native language.
📝 Timestamped notes you can share
Write Markdown notes pinned to a moment in the video. Public notes show up as avatars on the progress bar for other learners watching the same video.
💬 Danmaku on YouTube and Netflix
Comments scroll across the video at the moment they were posted, so you can see what other learners reacted to.
🤖 AI Q&A that knows the video
Ask questions about what's being said. Answers are based on the video's subtitles and include clickable timestamps.
▶️ Keeps the YouTube features you rely on
Chapters, thumbnail previews, the "most replayed" heatmap and YouTube Shorts (in a portrait layout) all keep working in study mode.
Also included: AI summaries, outlines and mind maps, shadowing practice with waveform comparison, and text-to-speech.
🌍 Languages
Learn: English, Japanese, Korean, French, German, Spanish, Italian, Chinese.
Native language / UI: 12 languages including Traditional Chinese, Portuguese, Vietnamese and Indonesian.
There's a free plan, and new accounts get a 3-day Premium trial with no credit card.
I'd really like to hear what you think, especially which language you're learning and what slows you down when you learn from videos. I'll be here all day answering questions.
About LingTube on Product Hunt
“Learn languages from YouTube and Netflix videos”
LingTube was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #238 on the daily leaderboard. Dictionary lookups often give the wrong meaning when a word has several senses. LingTube uses the subtitle line and part of speech to give the meaning used in that sentence. It also adds part-of-speech colors with furigana and pinyin, grammar breakdowns with CEFR levels, transcription for videos without captions, shareable timestamped notes, danmaku on YouTube and Netflix, and AI Q&A that knows the video. YouTube chapters, heatmap and Shorts still work.
On the analytics side, LingTube competes within Chrome Extensions, Education and Languages — topics that collectively have 146.9k followers on Product Hunt. The dashboard above tracks how LingTube performed against the three products that launched closest to it on the same day.
Who hunted LingTube?
LingTube was hunted by Dylan Wang. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of LingTube including community comment highlights and product details, visit the product overview.
Dylan Wang