Lingosive: frequently asked questions

Yes, the basics are free. Installing the extension, turning on dual subtitles on YouTube, Netflix, Prime Video, Disney+ and HBO Max and looking up word translations costs nothing and doesn't even need an account.

Some features have free-plan limits (see the next question), and an optional Premium plan removes them. Prices can vary by country, so they aren't listed here: current plans and prices are on the pricing page.

A free account gets 10 Lingosive AI explanations and 3 Word in Film searches a day, and you can save up to 100 words in total. In the mobile app you also get 5 minutes of video a day and the first 20 pages of every book.

• Lingosive AI: 10 explanations a day (a word explained in the context of its sentence).
• Word in Film: 3 different words or phrases a day; searching the same word again and searches with no results don't count.
• Saved words: 100 in total, not per day.
• Mobile app: 5 minutes of video a day and the first 20 pages of each book.

Dual subtitles and the quick translation you see when you hover over a word are not part of these counts. Premium removes the daily limits and the 100-word cap; details are on the pricing page.

No. On Netflix, dual subtitles work only in a browser on a computer, with the Lingosive extension. The Netflix apps on phones, tablets and TVs can't run browser extensions; that applies to every extension, not just Lingosive.

There is a Lingosive app for iPhone, iPad and Android, but it doesn't play Netflix: it shows its own curated library of YouTube videos with a translation line, lets you read books and brings your saved words back for review. More: mobile app · two subtitles on Netflix on a TV or phone.

No. There is no Lingosive version for Firefox or Safari. The extension is installed from the Chrome Web Store and works in Chrome, Edge, Brave and other Chromium-based browsers (Chrome 111 or later).

On a Mac, install it in Chrome, Edge or Brave instead of Safari. It doesn't work in Safari on iPhone or iPad either. Get it from the download page.

Dual subtitles work on five platforms, in a browser on a computer: YouTube, Netflix, Prime Video, Disney+ and HBO Max. Prime Video works on primevideo.com and on the video pages of amazon.com, amazon.co.uk, amazon.de and amazon.co.jp.

Crunchyroll, Viki, Apple TV+, Paramount+, Hulu and video files on your computer aren't supported, and there are no dual subtitles on YouTube Shorts, YouTube Music or YouTube videos embedded on other sites. Setup guides for each platform: dual subtitles.

The interface is in 13 languages: English, Spanish, German, French, Italian, Turkish, Portuguese, Hindi, Russian, Japanese, Korean, Simplified Chinese and Traditional Chinese. For the translation line and word meanings you choose your own language from a longer list: 68 languages in the extension.

• The language you're learning: word-level tools (clickable words, the word card) work best in 37 subtitle languages.
• Word in Film: English, Spanish, French, German and Japanese on the web and in the extension; the mobile app adds Italian, Portuguese and Russian.
• Mobile app videos and card practice: English, Spanish, French, German, Italian, Portuguese, Russian and Japanese.

Not for dual subtitles and word translations: install the extension and start watching. Saving words, Lingosive AI explanations, Word in Film and the web learning center need a free account.

You can sign in with Google, Apple or email. The same account works in the extension, the mobile app and on the web, so a word you save in one place shows up in the others.

The second line is machine translation: Lingosive automatically translates the subtitle you selected on the platform into your language. It is not the platform's second subtitle track.

That's why it works even when a show has no subtitles in your language, but the wording can differ from the platform's own subtitles and may contain the occasional mistake. For the original line to appear, a subtitle in the language you're learning has to be selected on the platform. Lingosive AI is a separate feature: it explains the word you click in the context of its sentence.

In short: the Language Reactor extension works on Netflix and YouTube; Lingosive also works on Prime Video, Disney+ and HBO Max and has an app for iPhone, iPad and Android. Neither works inside the Netflix app on a phone.

The Language Reactor details come from its own website (checked in October 2026). For a feature-by-feature comparison with sources, see Lingosive vs Language Reactor.

Yes. Lingosive is the current name of the extension previously known as Language Lab; its old address was languagelabextension.com. More in What is Lingosive?

While you watch, click the word in the subtitles and press “Learn” on the word card: the word goes into your saved list. You review it later with spaced-repetition flashcards in the Lingosive app or in the web learning center at lingosive.com/learn.

• The word card's three buttons: “Known”, “Learn” and “Don't Learn”. “Learn” saves the word to your list.
• In the mobile app: tap a word in the subtitles to see its translation, hear it and save it.
• Where you review: saved words sync to your account, so the same list shows up in the extension, the mobile app and on the web. Flashcard practice is available in 8 languages: English, Spanish, French, German, Italian, Portuguese, Russian and Japanese.
• Account and limit: saving words needs a free account. On the free plan you can save up to 100 words in total, and Premium removes that cap.

More: How to remember words from TV shows with spaced repetition.