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LingoKeep
Learn languages from the YouTube you already watch
Dual subtitles under the player, every word clickable for a dictionary, and one click saves it as a flashcard with the sentence and the exact moment it was said. FSRS spaced repetition included free, not a paid add-on. Spanish, Japanese, French, German.
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About LingoKeep on Product Hunt
“Learn languages from the YouTube you already watch”
LingoKeep was submitted on Product Hunt and earned 2 upvotes and 1 comments, placing #158 on the daily leaderboard. Dual subtitles under the player, every word clickable for a dictionary, and one click saves it as a flashcard with the sentence and the exact moment it was said. FSRS spaced repetition included free, not a paid add-on. Spanish, Japanese, French, German.
LingoKeep was featured in Chrome Extensions (52.9k followers), Education (79.5k followers) and Languages (14.5k followers) on Product Hunt. Together, these topics include over 58.9k products, making this a competitive space to launch in.
Who hunted LingoKeep?
LingoKeep was hunted by Zhang Jun. 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.
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Zhang Jun
I kept watching hours of Spanish YouTube and retaining almost none of it, and it took me
embarrassingly long to work out why. Freeflow watching never tells you which words you
missed. You finish an episode feeling like you understood it, and the words you actually
failed on are invisible, so they never get practised.
LingoKeep is my attempt at closing that loop without leaving the video. Dual subtitles
under the player, click any word for a dictionary in place, one click turns it into a
flashcard that keeps the sentence and the timestamp it came from. Reviews replay the clip,
so you hear the line again in the voice that said it.
Two build notes, since this is that kind of crowd. Japanese needed real morphological
segmentation before any of it worked, because you cannot click a word in a sentence with
no spaces in it. And getting an MV3 content script to survive YouTube's client-side
navigation was most of the last month.
FSRS is free, including sync and the whole study surface. What costs money is the card cap
and Anki export. I put the algorithm on the free side on purpose, since paywalling the
scheduler seemed like paywalling the point.
Four languages so far, English interface. Happy to answer anything.