NoaLingua Answer
How to enable dual subtitles on YouTube with NoaLingua
Turn captions on, and a second language appears under them
YouTube has no dual-subtitle setting, so an extension adds the second line. Install it, open a video that has captions, and press the CC button — the original stays where it is and a translation appears underneath. Because YouTube hands over the whole caption track at once, the translation is usually ready well ahead of you.
Short answer Install the extension, press CC on a video that has captions, and the second language appears underneath.
Step by step
Doing it with NoaLingua
- 1
Add NoaLingua to Chrome
Free, no account, Chrome 138 or newer.
- 2
Choose the language you are learning, and your own
Two dropdowns. Packs begin downloading immediately and in the background.
- 3
Open a video that has captions and press CC
Or the c key. Auto-generated captions count — the extension rebuilds them into whole sentences first.
- 4
Read both lines, and click anything you do not know
One click gives the meaning in that sentence, the dictionary form, the conjugation table and real examples. Save keeps the sentence and the timestamp.
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.
The detail behind the NoaLingua answer
Why YouTube works better than Netflix for this
YouTube exposes the whole caption track for a video in one request. That single fact is behind three things you will notice: the translation is usually prepared roughly a dozen sentences ahead of where you are, previous and next land exactly on sentence boundaries rather than mid-phrase, and the entire script can be exported as a bilingual document.
Netflix exposes no such file, so none of those three are possible there — for anybody, not just for us. If you have a choice of platform for study, YouTube is the one that gives a tool more to work with.
Captions are fragments; sentences are what you want
YouTube caption tracks are timed in fragments sized for the screen, not for grammar, so a single sentence is routinely split across three cues and a cue routinely holds the end of one sentence and the start of the next. Translating a fragment produces a translation of a fragment.
So the caption blocks are reassembled into whole sentences before anything is translated. That is also what makes replay useful: pressing back lands you at the beginning of a sentence rather than four words into the previous one.
More questions people ask NoaLingua
Does it work with auto-generated captions?
Yes. Auto-generated tracks arrive without punctuation, so a punctuation model restores sentence boundaries before the text is grouped and translated. Quality follows the quality of the underlying transcript.
Can I export the whole video as a bilingual document?
On YouTube, yes — the entire caption track is available at once, so the full script can be exported with an honest count of what was captured. On Netflix this is impossible for any tool.
Does this work on the YouTube mobile app?
No. A Chrome extension runs in a desktop browser only. There is no mobile version, and no Firefox or Safari build today.
Where this is documented on NoaLingua
Related NoaLingua answers
Try it on the next thing you were going to watch anyway.
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.