← StreamTranslate

Multilingual Captions for YouTube Live

Reach a global YouTube Live audience with real-time multilingual captions. Stream in English, viewers see subtitles in their language. Works in OBS, Streamlabs, and Meld Studio.

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YouTube Live doesn't have native multilingual captions

YouTube auto-generates English captions for English speech and Spanish for Spanish speech — but it doesn't TRANSLATE one to the other in real time. If you stream in English, your French, German, Japanese, and Portuguese viewers see auto-generated English text or nothing at all.

YouTube's promised live multilingual captions (announced in 2024) shipped for select Partner Program creators only — and only for post-uploaded VOD, not live streams.

StreamTranslate fills the gap with a browser source overlay that translates your speech into your target audience's language in real time.

Setup for YouTube Live

  1. Free signup — Free Plan with 3 hours every month, card required for the Free Plan; no payment unless you upgrade.
  2. Set source language (e.g. English) + target (e.g. Portuguese for Brazilian audience).
  3. Copy your OBS browser source URL.
  4. OBS → Browser Source → paste URL → 1920x1080 → place above your scene.
  5. Start YouTube Live. Multilingual captions appear on stream within 2 seconds of you speaking.

Why this matters for YouTube growth

YouTube's algorithm favors watch-time. International viewers who can't understand your stream don't stay, hurting your retention metric. Adding their language as live captions:

  • Boosts watch-time from international viewers (3-5x in early data)
  • Opens you up to YouTube's regional recommendation queues (BR, MX, JP)
  • Improves comment volume from non-English-speaking viewers
  • Builds an audience YouTube actively wants to surface in international markets

Frequently Asked Questions

Does YouTube Live have built-in multilingual captions?

No, not for most creators. YouTube auto-generates same-language captions but doesn't translate live. StreamTranslate adds that as a browser source overlay.

How does the multilingual caption show on stream?

As a transparent browser source overlay rendered on your video feed via OBS/Streamlabs/Meld Studio. Viewers see styled captions on top of your gameplay or camera.

Can I show multiple languages at once?

Yes — dual-language mode shows source + translated together (e.g. English on top, Portuguese below).

Will this affect YouTube's auto-captions?

No. YouTube's native auto-captions stay separate. StreamTranslate overlay is part of the video feed itself.

What languages are supported?

65 including Spanish, Portuguese (BR), French, German, Japanese, Korean, Mandarin, Arabic, Hindi, Russian, Italian, Indonesian, Vietnamese, Turkish.

What is the latency?

Under 500ms end-to-end from speech to on-screen captions.

Related guides

Ready to add live translation to your stream?

Free Plan with 3 hours every month. card required for the Free Plan; no payment unless you upgrade. Works with OBS, Streamlabs, Meld Studio.

Get started →

Also stream IRL

Also supports IRL with Moblin and the OBS audio plugin, including home and cloud OBS setups such as IRL Toolkit.

Use an OBS receiver for IRL Pro, Larix Broadcaster, PRISM Live Mobile or TVU Go. Cloud providers may need to install the plugin on your server.

Moblin · Moblin Browser Source · Cloud OBS · IRL Toolkit · OBS Studio · IRL Pro · Larix Broadcaster · PRISM Live Mobile · TVU Go · MediaMTX

IRL setup guide · Desktop setup guide