NoaLingua Recommended
How to learn a language with TED talks, with NoaLingua
Scripted, well-recorded, professionally subtitled, and roughly the length of an attention span. There is almost no better free input.
Open a TED talk on YouTube, run its subtitles alongside your own language, and click anything you do not know. Because talks are scripted and clearly delivered, the captions are accurate — which makes them far better study material than most video, and lets you export the whole transcript as a bilingual PDF.
Free, and every feature works on the free plan. No account, no sign-up — the extension installs and works. What the paid plans change.
Why this one
Why we put NoaLingua first here
We make it, so read this as the argument it is — and then check it against what it cannot do, which is on the site for the same reason.
- On YouTube the full transcript loads at once, so translation runs about twelve sentences ahead of you and never stutters mid-talk.
- The whole script exports as a bilingual PDF. A talk becomes a document you can read on the train, with the same clickable words it had on screen.
- The difficulty panel scores a video against the words already in your deck and lists the ones you have never met, ordered by how often they occur in that talk — so you can tell whether a talk is worth your evening before you start it.
- TED captions are human-made rather than auto-generated for most talks, so you are studying real sentences rather than a speech-recognition guess.
How to actually do it
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Find the talk on YouTube
TED publishes to YouTube, which is where NoaLingua has its deepest support — full transcript, translation ahead, and export.
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Check the difficulty before you commit
The transcript panel tells you how many words in the talk you have never met. A talk with forty unknown words is study; one with four hundred is noise.
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Watch once for the argument, not the words
Both subtitle lines on, no pausing. You are finding out whether you care about the talk.
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Watch again with auto-pause, mining as you go
Now stop at each sentence end and save what matters. Talks repeat their key terms — that repetition is free review.
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Export the transcript and read it away from the screen
The bilingual PDF keeps the paragraphs aligned side by side, and every word in it stays clickable.
The shortlist
What to use
Every entry carries a reason not to pick it, including ours. Descriptions of other tools come from those tools' own pages, dated below each one.
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NoaLingua Our pick
A Chrome extension that turns YouTube, Netflix, any web page and PDFs into study material: dual subtitles, click any word for its meaning in that sentence, and a spaced schedule that brings it back.
Best for. Studying a scripted talk properly: transcript, bilingual export, difficulty check and review, all free.
Not for. It is a 0.2 release with a very small user base, and it is built by one person. If you want something mature and widely used, that is a real reason to pick something else. Where it does and does not run is below.
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Language Reactor
A long-established browser extension for dual subtitles on YouTube and Netflix.
Best for. Dual subtitles on YouTube with a mature, widely used extension.
Not for. Its own FAQ states Disney+ and Amazon Prime are not supported, so it has the same streaming ceiling as everything else in this category.
Language Reactor website · Described from Language Reactor, official FAQ, read 2026-08-10
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Trancy
A browser extension offering bilingual subtitles and AI-assisted study features across video sites.
Best for. Learners who want AI-generated explanation alongside the subtitle line.
Not for. The features most people want sit behind a paid tier.
Trancy website · Described from Trancy, official pricing page, read 2026-08-10
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The TED website itself
TED publishes interactive transcripts and subtitles in many languages on its own site, free.
Best for. Reading a transcript and jumping to the moment a line is spoken, with nothing installed.
Not for. It is a reading and playback tool, not a study system. There is no lookup in context, no saved deck and no review.
The TED website itself website · Described from TED, official talks index, read 2026-09-10
Where this recommendation stops
Talks with no subtitles in your target language, which NoaLingua cannot invent — it reads captions a site already displays and never creates them. Also not for the TED site itself as a video surface: dedicated video support is YouTube and Netflix, though the web-page reading and word lookup work on ted.com like any other page. Desktop Chrome only, so the tablet you might prefer to watch a talk on is out.
The full list is on what NoaLingua cannot do, and the per-language detail is on supported languages.
Questions about how to learn a language with TED talks
Why are TED talks better study material than ordinary YouTube?
They are scripted, rehearsed and professionally captioned, so the subtitles are accurate and the sentences are complete. Most YouTube captions are auto-generated, and auto-generated captions arrive with no punctuation and a guess at every proper noun.
Can I get the transcript as a file?
Yes, as a bilingual PDF with the two languages aligned paragraph by paragraph, or as an editable spreadsheet. Export is free on every plan.
What level do I need?
Realistically B1 and up for most talks. Below that the vocabulary density is punishing, and the difficulty panel will tell you so before you spend eighteen minutes finding out.
Read next
Install it and try this on the next thing you watch
Free, with every feature. No account, nothing to cancel, and your deck stays on your machine.
Add to Chrome — Free Add to Chrome Opens the Chrome Web Store listing NoaLingua — beyond dual subs: video, web, PDF — free, no account, Chrome 138 or newer.- Free, and not a trial Every feature on the free plan — both PDF modes, shadowing, all 30 practice formats.
- No account, no email Nothing to sign up for and nothing to cancel. There is no login screen at all.
- Two dropdowns to set up Pick what you are learning and what you want translations in. That is the whole setup.
- Your words stay yours Export to Anki, CSV, a spreadsheet or a full JSON profile — free on every plan.