LanguageHack: Learn Chinese on YouTube

About

LanguageHack turns Chinese subtitles on YouTube into a tap-to-learn dictionary.

Watch anything with Chinese subtitles — vlogs, lessons, dramas. Tap any word to
see its pinyin, meaning and HSK level, then save it to your spaced-repetition
deck with one tap.

WHAT IT DOES
• Clickable subtitles — every word in the Chinese caption becomes tappable
• Instant pinyin + English meaning + HSK level, fully offline (bundled
  dictionary — the full New-HSK 1–9 set, ~11,500 entries)
• Works even when the subtitles are part of the video itself (experimental):
  many Chinese videos have the words printed right onto the picture, with no
  caption track you can click. LanguageHack still recognizes those characters
  straight from the video image — something subtitle-based tools can't do
• One-tap save to your LanguageHack spaced-repetition account (optional)
• Traditional-script aware: 學/学, 什麼/什么 resolve to the same entry
• Two overlay themes: Glass (transparent) and Warm (LanguageHack)

PRIVATE BY DESIGN
• Lookups work offline — no account required
• When it reads words off the video image, that happens on your device — the
  video frames never leave your browser
• No ads, no analytics, no data sale

HOW TO USE
1. Open a YouTube video with Chinese subtitles — the overlay appears
   automatically. If the Chinese is printed onto the video (no caption track to
   click), switch on "Read on-screen subtitles" in the popup.
2. Tap a word to see pinyin and meaning.
3. Connect your LanguageHack account to save words, then review them daily at
   languagehack.online.

NOTES
• Dictionary covers the full New-HSK 1–9 vocabulary (~11,500 words)
• Reading subtitles off the video image is experimental and uses more power
  while it's switched on
• LanguageHack is an independent project, not affiliated with or endorsed by
  YouTube or Google