The 7 Best Language Reactor Alternatives in 2026 (by Platform)

The best Language Reactor alternative depends on why you want one. If your show is on Prime Video, Disney+, HBO Max or Crunchyroll, try Sublo: it names all four, plus Netflix, YouTube and six more services, and translates with Google Gemini. For something close to Language Reactor on YouTube, Trancy is the nearest match. If flashcards are the point, look at asbplayer (free, with Anki card mining) or Migaku (built around Anki-style flashcards).

Below are seven alternatives, ranked by how many viewers they suit, with the streaming services each one names, a comparison table and a short verdict for each. Language Reactor is still a good tool for what it was built for, so we also say when to keep it.

Sublo is our product. We list it first because it names more streaming services than any other tool here, and we say plainly where Language Reactor and the others do something better. Platforms are as each vendor names them on its own website or store listing, checked in November 2026.

Why people look for an alternative

Language Reactor, formerly Language Learning with Netflix, is the extension that made dual subtitles popular. What it does best is study: it puts two subtitle lines on Netflix and YouTube and builds a strong study workflow around them, with a free version and a paid Pro plan. If those two services and that workflow are all you need, keep it.

People look for an alternative for three reasons:

• Another streaming service. Language Reactor is built for Netflix and YouTube. Prime Video, Disney+, HBO Max and Crunchyroll are not among the services it names, so if you watch there, you need a second tool. Our guides cover each one: Prime Video, Disney+, HBO Max and Crunchyroll.
• AI translation. The second line comes from Google Translate, which is classic machine translation. Some learners want an AI model instead, one that translates the whole line with its tone, slang and context.
• Fewer study features. Some viewers just want to understand the show and prefer two plain subtitle lines to a study workflow.

All 7 alternatives at a glance

For reference: Language Reactor names Netflix and YouTube and translates with Google Translate.

Services as each vendor names them on its website or store listing, checked November 2026. These lists change, so check the vendor's page before you pay.

1. Sublo: best for every service beyond Netflix and YouTube

Best for: Language Reactor users whose shows are on Prime Video, Disney+, HBO Max, Crunchyroll or another service
Works on: Netflix, Prime Video, Disney+, HBO Max, Hulu, Paramount+, Peacock, Crunchyroll, YouTube, Apple TV+, MUBI and Plex; other video sites can be switched on from the popup

Sublo reads the subtitle track the streaming service is already playing and shows a translated line together with the original, or only the translation, in real time. Besides Netflix and YouTube, it names ten more services, among them Prime Video, Disney+, HBO Max and Crunchyroll. The translation comes from Google Gemini, an AI model that translates whole lines in context, into any of 58 languages.

There is no study workflow: no word saving, pop-up dictionary or Anki export. If those are why you use Language Reactor, keep it for Netflix and use Sublo for the other services. The free plan includes a daily allowance on every supported service without an account; Pro removes the limit from €2.89 a month billed yearly. Service by service: Prime Video, Disney+, HBO Max, Crunchyroll. Side by side: Sublo vs Language Reactor.

2. Trancy: best for YouTube, and the closest in spirit

Best for: learners who like the Language Reactor idea and watch mostly YouTube
Works on: YouTube, Netflix and HBO Max, plus TED, edX and Coursera, according to its website

Trancy is the closest to Language Reactor in spirit: bilingual subtitles, strongest on YouTube, with a free plan that translates with Google Translate. Its website also names Netflix, HBO Max and course sites such as TED, edX and Coursera, so it covers HBO Max, which is not among the services Language Reactor names.

The paid plan offers AI models such as GPT, Claude and Gemini; Language Reactor translates with Google Translate. You need an account to use it. More in Sublo vs Trancy.

3. InterSub: best for looking up words on more services

Best for: learners who want dual subtitles and a dictionary on Prime Video, HBO Max or Crunchyroll
Works on: Netflix, YouTube, Prime Video, HBO Max, Crunchyroll, Udemy and Coursera, according to its website

InterSub combines dual subtitles with a pop-up dictionary, which keeps some of the study feel of Language Reactor. Its website names Netflix and YouTube, and also Prime Video, HBO Max and Crunchyroll, plus course sites such as Udemy and Coursera.

Dual subtitles are free with a limited number of word lookups, and AI subtitle translation is in its paid plans. Pick it if you want to keep looking up words on services beyond Netflix and YouTube.

4. Immersive Translate: best if you translate more than video

Best for: people who also translate websites and PDFs, and want to pick the translation service
Works on: YouTube, Netflix, Prime Video, HBO Max and many other video sites, according to its video page

Immersive Translate is a general translator for web pages, PDFs and many video sites, with bilingual video subtitles. Its video page names YouTube, Netflix, Prime Video and HBO Max. You choose the translation service from many, such as ChatGPT, DeepL, Google Translate, DeepSeek and Gemini.

Pick it if you want one extension for reading and watching. A Pro plan exists; check its website for what each plan includes. Our Immersive Translate alternatives compare it for streaming.

5. asbplayer: best free option for study-minded learners

Best for: learners who build their own study system with Anki, and anyone with local video files
Works on: Netflix and YouTube with automatic subtitle detection, other streaming sites through a generic mode, and local video files

asbplayer is free, open source and popular with Japanese learners. It detects subtitles automatically on Netflix and YouTube, has a generic mode for other streaming sites, and works with local video files. Its standout feature is Anki card mining: turning a subtitle line into a flashcard.

For Language Reactor users who mainly study, it is the closest free match. It is not a translator, though, so if a translated second line is what you need, choose one of the tools above.

6. Migaku: best for Anki users

Best for: serious immersion learners who already use Anki
Works on: streaming sites; check its website for the current list

Migaku is built around Anki-style flashcards and is priced as a premium product. Subtitles are one part of a larger study system.

If Language Reactor's study tools were the reason you used it and you want to go further with flashcards, it is worth a look. If you just want to understand what is being said, it is more than you need. More in Sublo vs Migaku.

7. eJOY: best for English learners

Best for: people learning English from films and videos
Works on: Netflix and YouTube

eJOY is an English-learning toolkit for Netflix and YouTube, with word saving and flashcards. It is free to install, and its AI tool works on YouTube and Netflix.

It names the same two services as Language Reactor, so it is an alternative for features, not for platforms. For another language, or for services beyond Netflix and YouTube, look at Sublo or InterSub.

Which one should you pick?

• Prime Video: Sublo, InterSub or Immersive Translate; all three name it. More in the best Prime Video subtitle extensions.
• HBO Max: Sublo, Trancy, InterSub or Immersive Translate. More in the best HBO Max subtitle extensions.
• Disney+: Sublo.
• Crunchyroll: Sublo or InterSub.
• Hulu, Paramount+, Peacock, Apple TV+, MUBI or Plex: Sublo.
• Netflix and YouTube, for study: keep Language Reactor, try Trancy on YouTube, or add asbplayer or Migaku for Anki cards.
• Learning English: eJOY.

asbplayer also has a generic mode for other streaming sites, and Migaku lists its sites on its website. You don't have to replace Language Reactor at all: you can keep it for Netflix and use a second tool for the rest. New to two subtitle lines? Start with dual subtitles explained.

How we compared them

We looked at the tools people name most often as Language Reactor alternatives and compared them on four points: which streaming services each one names, whether it shows two subtitle lines, how the translation is made, and what it offers for study, such as a dictionary or flashcards. The platform lists come from each vendor's own website or store listing in November 2026.

We don't list prices for the other tools, because they change often; check them on the vendor's site. LingQ comes up in many of these lists too, but it is a full course platform rather than a subtitle extension, so it is not ranked here. For a wider view, see our list of the best subtitle extensions.

Frequently asked questions

Does Language Reactor work on Amazon Prime Video?

Language Reactor is built for Netflix and YouTube; Prime Video is not among the services it names. Sublo, InterSub and Immersive Translate all name Prime Video. Details: Language Reactor and Prime Video.

Does Language Reactor work on HBO Max or Disney+?

Neither is among the services Language Reactor names; it is built for Netflix and YouTube. Sublo names both, and Trancy, InterSub and Immersive Translate name HBO Max. More in our guides for HBO Max and Disney+.

Does Language Reactor work on Crunchyroll?

Crunchyroll is not among the services Language Reactor names; it is built for Netflix and YouTube. Sublo and InterSub both name Crunchyroll. More in Language Reactor alternatives for Crunchyroll.

Is there a free Language Reactor alternative?

Yes. Sublo has a free plan with a daily allowance on every supported service, without an account or card, and asbplayer is free and open source. Trancy has a free plan that translates with Google Translate (an account is required), InterSub's dual subtitles are free with a limited number of word lookups, and eJOY is free to install.

Language Reactor vs Trancy: which is better?

It depends on where you watch. Language Reactor is built for Netflix and YouTube, with a strong study workflow and translation by Google Translate. Trancy is strongest on YouTube, also names HBO Max, needs an account and offers AI models such as GPT, Claude and Gemini in its paid plan.