OBS Translation Plugins Compared: LocalVocal, StreamTranslate, and StreamFluent (Reddit Streamers Guide 2026)
Matt McElligott
If you have spent any time on Reddit threads about multilingual streaming, you have seen the same question over and over: what is the best OBS translation setup? Some streamers swear by local AI plugins. Others paste a browser source URL and call it a day. A growing number want full voice dubbing — not just subtitles — so viewers hear the stream in their language.
This guide compares the three tools that come up most often when streamers search for obs translation, obs translation plugin, and live stream translation service options in 2026: LocalVocal, StreamTranslate, and StreamFluent.
The Three Approaches to OBS Translation
Before comparing features, it helps to understand that "OBS translation" is not one product category — it is three different architectures:
| Approach | Example | Where processing happens | Output type |
|---|---|---|---|
| Local OBS plugin | LocalVocal | Your PC (CPU/GPU) | Captions + optional text translation |
| Cloud browser source | StreamTranslate | StreamTranslate servers | Translated subtitle overlay |
| Cloud AI dubbing + relay | StreamFluent | StreamFluent servers | Dubbed audio + captions + multi-platform RTMP |
Each solves a different problem. Reddit discussions often conflate them, which is why streamers end up frustrated after installing the wrong tool for their goal.
LocalVocal: The Privacy-First OBS Translation Plugin
LocalVocal by royshilkrot is the most popular obs translation plugin on the OBS Forums, with over 128,000 downloads and 311,000+ views. It runs OpenAI Whisper locally via Whisper.cpp for speech-to-text, and uses CTranslate2 with M2M100 for neural machine translation.
What LocalVocal does well
- 100% local processing — no cloud costs, no network dependency, privacy-first (all data stays on your machine)
- No GPU required (though CUDA, OpenCL, and Apple Silicon acceleration are supported)
- Real-time transcription in 100 languages
- Caption output to OBS text sources,
.txt,.srt, or RTMP caption streams - Built-in translation via Whisper or NMT models
- Free and open source — download from GitHub releases
- Works on Windows, macOS, and Linux (OBS 30.2.0+)
Where LocalVocal falls short for international growth
LocalVocal is excellent for captions and text translation. It does not:
- Dub your voice into another language — viewers still hear you in your original language
- Send language-specific audio to separate Twitch/YouTube channels automatically
- Run multiple dubbed output streams from a single OBS session without manual routing
- Clone your voice for translated audio
Reddit reviews on the OBS Forums highlight another reality: model downloads can stall, CPU-only mode can feel sluggish, and occasional buffer repetition bugs appear in longer streams. For a German streamer who wants English subtitles, LocalVocal is a strong choice. For a streamer who wants English viewers to hear a dubbed version of their voice, it is the wrong tool.
LocalVocal pricing
Free. Sponsor the developer on GitHub Sponsors if you rely on it.
StreamTranslate: Cloud Browser-Source OBS Translation
StreamTranslate takes the opposite approach from LocalVocal: zero local processing. You sign up, pick languages in the control panel, copy a browser source URL, and add it to OBS at 1920×1080. Subtitles appear on stream in under 2 seconds with no GPU load on your machine.
StreamTranslate also operates a separate product at streamtranslate.com focused on live conversation translation for iOS/Android (travel, meetings) — different from the streaming product at streamtranslate.live.
What StreamTranslate does well
- Fast setup — paste URL, go live; no plugin install
- 30+ languages for real-time subtitle translation
- Works with OBS, Streamlabs, Meld, Prism, XSplit — anything supporting browser sources
- Twitch extension lets each viewer pick their own subtitle language (viewer-side, no overlay needed)
- Dual-language mode on Pro ($34.99/mo) and Elite ($149/mo) plans
- Free 6-hour trial, no credit card
- Watch Party mode — translate tab audio (Netflix, YouTube, sports)
StreamTranslate pricing (streamtranslate.live)
| Plan | Price | Hours | Notes |
|---|---|---|---|
| Stream Pass | $9.99 | 12 hrs (one stream) | No subscription |
| Starter | $14.99/mo | 25 hrs/mo | $1.00/hr overage |
| Pro | $34.99/mo | 50 hrs/mo | Dual subtitles, custom styling |
| Elite | $149/mo | Unlimited | Priority support |
StreamTranslate also has a listing on the OBS Forums as a browser-source resource — positioning itself explicitly against local plugins: "Local plugins require GPU resources and break when OBS updates."
Where StreamTranslate falls short
Like LocalVocal, StreamTranslate is fundamentally a caption/subtitle tool. It translates text on screen; it does not:
- Replace your microphone audio with a dubbed voice track
- Output separate RTMP streams per language to different platform accounts
- Offer voice cloning so your Spanish stream sounds like you speaking Spanish
For VTubers and IRL streamers who only need translated text overlays, StreamTranslate is a credible option. Reddit founders have posted about building tools in this space — including a r/roastmystartup thread about StreamTranslate.live — reflecting how much demand exists for accessible OBS translation.
StreamFluent: OBS Translation With AI Voice Dubbing
StreamFluent targets the problem Reddit streamers describe but rarely find a good answer for: reach audiences who do not read subtitles at all. Instead of only overlaying translated text, StreamFluent generates real-time AI voice dubbing in up to 32 languages — plus unlimited captions on every plan.
Three ways to use StreamFluent with OBS
- OBS plugin — captures mic audio locally, sends it to StreamFluent's cloud pipeline, returns dubbed audio as OBS audio sources (download and setup guide)
- RTMP relay — point OBS at one StreamFluent RTMP URL; the relay forwards your main stream untouched and creates dubbed outputs per destination
- Dashboard destinations — configure Twitch/en, YouTube/es, Kick/ja each with their own language output
What StreamFluent does well
- Real-time AI voice dubbing — viewers hear translated audio, not just subtitles
- Unlimited captions on all plans (Free through Scale)
- 32+ languages for dubbing and captions
- Custom AI voice from a short sample (Basic plan and above)
- Voice cloning on Pro+ plans
- Multi-platform RTMP output — one stream in, multiple language-specific streams out
- Sub-1-second latency target for the audio pipeline
- Free tier: unlimited captions + 3 hours dubbed audio/month, no credit card
StreamFluent pricing
| Plan | Price | Dubbed minutes | Languages | Multi-platform |
|---|---|---|---|---|
| Free | $0/mo | 180 min (3 hrs) | 1 | 1 destination |
| Basic | $9.99/mo | 600 min (10 hrs) | 2 | 1 destination |
| Starter | $27.99/mo | 1,500 min (25 hrs) | 3 | 2 destinations |
| Pro | $67.99/mo | 4,800 min (80 hrs) | 7 | Unlimited |
| Scale | $249.99/mo | 15,000 min (250 hrs) | 15 | Unlimited |
Trade-offs
StreamFluent requires cloud processing (like StreamTranslate), so you need a stable internet connection. The OBS plugin adds a setup step compared to a pure browser source — but in return you get dubbed audio sources inside OBS, which browser-source-only tools cannot provide.
Side-by-Side Comparison: OBS Translation in 2026
| Feature | LocalVocal | StreamTranslate | StreamFluent |
|---|---|---|---|
| Type | Local OBS plugin | Cloud browser source | Cloud plugin + RTMP relay |
| Setup time | 15–30 min (model download) | ~2 min | 5–10 min |
| GPU/CPU impact | High (local AI) | Zero | Low (plugin) / zero (relay) |
| Translated subtitles | ✅ | ✅ | ✅ (unlimited) |
| AI voice dubbing | ❌ | ❌ | ✅ |
| Multi-platform language outputs | ❌ | ❌ | ✅ |
| Voice cloning | ❌ | ❌ | ✅ (Pro+) |
| Privacy (local-only) | ✅ | ❌ | ❌ |
| Free tier | ✅ (fully free) | ✅ (6-hr trial) | ✅ (3 hrs dubbing/mo) |
| Best for | Caption-only, privacy | Quick subtitle overlay | Growing international audience |
What Reddit Streamers Actually Ask For
Across r/Twitch, r/OBS, r/streaming, and r/roastmystartup, the obs translation conversation usually breaks down into three camps:
- "I want free captions on my stream" → LocalVocal or StreamFluent free captions
- "I want translated subtitles without installing anything heavy" → StreamTranslate browser source
- "I want viewers in other countries to actually watch my stream" → StreamFluent voice dubbing + multi-destination RTMP
The third camp is underserved by plugin-only and browser-source-only tools. Subtitles help accessibility; dubbing changes discoverability. A Portuguese viewer browsing Twitch at 11 PM is far more likely to stay on a stream they can hear in Portuguese than one with small English subtitles at the bottom of a gameplay scene.
Which OBS Translation Tool Should You Choose?
Choose LocalVocal if:
- You want everything running locally with no cloud dependency
- Captions (with optional text translation) are enough
- You have a decent CPU or GPU for Whisper inference
- Budget is $0
Choose StreamTranslate if:
- You want the fastest possible setup (browser source only)
- Subtitle overlays are your goal, not dubbed audio
- You like the Twitch extension for per-viewer language selection
- 25–50 hours/month of streaming fits your schedule
Choose StreamFluent if:
- You want AI voice dubbing, not just translated text
- You are running separate language channels (Twitch/en + YouTube/es + Kick/ja)
- You need unlimited captions plus metered dubbing minutes
- You want voice cloning so translated streams sound like you
Getting Started
- LocalVocal: OBS Forums resource page → GitHub releases
- StreamTranslate: streamtranslate.live → control panel → copy browser source URL
- StreamFluent: Sign up free → OBS plugin guide or RTMP relay setup
The best obs translation plugin or service depends on whether you need captions, subtitles, or full voice dubbing. Reddit threads will keep debating it — but the architecture you choose matters more than any single feature checklist.
Last updated: July 2026. Pricing and features reflect publicly listed information from each provider.