75% of Twitch's 140 million monthly users are outside the US. If you stream in English only, you're visible to about 25% of the potential audience. Adding real-time translated subtitles makes your stream accessible to everyone else — and it takes under 5 minutes to set up.
How Real-Time Stream Translation Works
StreamTranslate captures your microphone audio through your browser, transcribes your speech with AI, translates it into your chosen language or languages, and outputs the text as a browser source URL. You add that URL to OBS as a browser source overlay — it appears on your stream exactly like any other overlay element. International viewers see the translated subtitles in real time as you speak.
Caption timing varies with audio quality, spoken language, translation language, and connection conditions. Test a short recording before broadcasting. Check whether the caption position and reading time work for both audiences.
OBS Setup: 5 Minutes
- Create a free account at streamtranslate.live
- Go to your dashboard and copy your unique browser source URL
- In OBS, add a new Browser Source to your scene
- Paste the URL, set dimensions to 1920×1080
- Click Go Live in StreamTranslate, then start your OBS stream
Subtitles will appear on your stream immediately. You can adjust the position, size, and style of the subtitle overlay from the StreamTranslate dashboard.
Which Languages Should You Add?
Start with one or two based on your existing audience or where you want to grow:
- Spanish — highest-ROI first choice for most English streamers. Latin American gaming audience is massive and growing.
- Portuguese — Brazil alone is one of the world's largest streaming markets.
- French — large gaming community across Europe and Africa.
- Japanese — highly engaged, premium audience. Harder to break through but loyal.
- Korean — esports-heavy community, very active on streaming platforms.
Watch Party: Translate Content You're Watching
StreamTranslate's Watch Party mode (Elite plan) works in the opposite direction: instead of translating what you're saying, it translates what you're watching. Open a foreign-language stream or game announcement in one browser tab, switch StreamTranslate to Watch Party mode, and translated subtitles appear in real time. Useful for reaction streams and watch parties.
StreamTranslate works with OBS, Streamlabs, Meld, and any software that supports browser sources. Start free at streamtranslate.live.
Frequently Asked Questions
How do I add translated subtitles to my Twitch stream?
Create an account at streamtranslate.live, copy your browser source URL from the dashboard, add it as a browser source in OBS at 1920x1080, and click Go Live. Translated subtitles will appear on your stream in real time.
Does stream translation work with YouTube and Kick?
Yes. StreamTranslate works with any platform you stream to from OBS, Streamlabs, or Meld — Twitch, YouTube Live, Kick, TikTok Live, Facebook Gaming. The OBS browser source overlay appears on all streams.
How many languages can I translate my stream into simultaneously?
Pro plan supports two languages simultaneously. Elite plan supports multiple language outputs. Starter and Stream Pass support one language at a time.
How much does it cost to translate a live stream?
Free Plan: 3 hours every month. Card required; no payment unless you choose to upgrade. StreamTranslate offers a Stream Pass for $12 (single session, 12 hours), Starter at $14.99/month, Pro at $34.99/month, and Elite at $149/month. A free trial is available to test the setup before subscribing.