Start watching in your language.
Install Sublo for free and pick from 50+ languages — no account, no setup.
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Sublo adds a second, translated subtitle track to Amazon Prime Video in real time — pick any of 50+ languages. Works where Language Reactor doesn't. No account needed.
On your phone? Sublo runs in desktop Chrome. Send yourself the link and set it up on your computer in a minute.
Link copied — open it on your computer.
Amazon Prime Video shows exactly one subtitle track at a time and, for many titles outside the US, only a handful of languages. Popular learning extensions don't help here: Language Reactor does not work on Amazon Prime Video — it supports Netflix and YouTube only — and the same goes for Trancy and Migaku. Prime Video has been one of the most requested platforms for dual subtitles for years.
Sublo reads the subtitle track Prime Video is already playing and adds a second line in the language you choose, translated in real time by Gemini AI. That gives you dual subtitles on Prime Video in about a minute:
It works on the Prime Video website in every region — amazon.com, amazon.co.uk, amazon.de, amazon.co.jp, primevideo.com — on Prime originals as well as licensed titles and channels.
Step-by-step guide: How to add dual subtitles to Amazon Prime Video · Background: Does Language Reactor work on Amazon Prime?
No account. No setup. Just install, pick two languages, and press play.
Add the extension to Chrome with one click. No sign-up required.
Turn on subtitles in your streaming service for a moment — Sublo loads them silently.
Click the Sublo icon and choose any two languages from 50+ options.
Sublo does not store, redistribute, or host subtitle content. Subtitles are read locally from your existing streaming subscription and temporarily processed for on-screen display only — analogous to adjusting display settings in your browser.
English, German, Spanish, French, Japanese, Korean, Arabic, Chinese and 22 more — pair any two and Sublo stacks them perfectly.
Subtitles are translated on the fly so they're always in sync with what's on screen — millisecond-perfect.
Font size, color, position and background opacity — set independently for each track.
Subtitles stay visible in fullscreen. Nothing interrupts the show.
No account required. Your viewing habits are never tracked or stored.
Netflix, Max, Disney+, Prime, Crunchyroll, YouTube, Apple TV+ and more.
From language learners to film buffs, here's what people are saying.
I'm three episodes into a Korean drama and I've already picked up phrases I never learned in two years of class. This is genuinely the way to learn a language.
Watching Studio Ghibli with both Japanese and English running side by side made me cry. It's like reading the original poetry next to the translation.
I teach ESL and have my students watch shows with Sublo for homework. The dual subtitles do half my job for me.
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Install Sublo for free and pick from 50+ languages — no account, no setup.