LocalVocal OBS Translation Plugin Review: Free Local Captions vs Cloud Alternatives (Reddit 2026)
Matt McElligott
Ask Reddit how to add obs translation to a live stream and LocalVocal appears in almost every reply. With 128,000+ downloads, a 4.27-star rating, and active development through v0.5.3 (November 2025), it is the default recommendation for streamers who want free, local, real-time captions and translation without sending audio to the cloud.
But "best obs translation plugin" on Reddit means different things to different people. Some want privacy. Some want zero CPU impact. Some want their Twitch stream to reach Brazil — which requires more than translated text on screen.
This review covers what LocalVocal actually does, what OBS Forum and Reddit reviewers report, and when cloud alternatives like StreamTranslate or StreamFluent make more sense.
What Is LocalVocal?
LocalVocal is an OBS Studio plugin by royshilkrot that adds an audio filter to any speech source (microphone, media input). It transcribes speech to text in real time using OpenAI's Whisper model, running locally via whisper.cpp. For translation, it supports:
- Whisper built-in translation (speech → English text)
- Neural machine translation via CTranslate2 and the M2M100 model
Everything runs on your machine. No API keys. No subscription. No audio leaves your PC.
Requirements: OBS Studio 30.2.0+, Windows/macOS/Linux, 64-bit.
Download: GitHub releases or the OBS Forums resource page.
LocalVocal Features
Real-time transcription (100 languages)
LocalVocal transcribes live speech into text with Whisper. You can display captions on-screen via OBS text sources, export to .txt or .srt files, or send captions over RTMP to platforms like YouTube.
Real-time translation
Translate captions into major languages using either Whisper's built-in translation or dedicated NMT models. This is text translation — the translated words appear as captions, not as spoken audio.
Bring your own Whisper model
Advanced users can load any GGML-compatible Whisper model from Hugging Face — trading speed for accuracy or vice versa.
Hardware acceleration
LocalVocal supports CUDA (NVIDIA), OpenCL (AMD), Apple Silicon (Arm64), AVX, and SSE. The OBS listing says "no GPU required" but Reddit reviewers consistently report that CPU-only mode is usable but not great for live streaming alongside games.
Privacy-first architecture
For streamers who refuse to send microphone audio to third-party servers, LocalVocal is the clearest answer in the obs translation plugin category. All inference is local.
Additional output options
- Synced captions with OBS recording timestamps
- RTMP caption stream injection
- File export for post-production subtitles
LocalVocal Setup Overview
- Download the plugin for your OS from GitHub releases
- Install into your OBS plugins folder
- Add LocalVocal as an audio filter on your microphone source
- Download a Whisper model from within plugin settings
- Connect output to an OBS Text Source for on-screen captions
- Configure translation target language if needed
Setup takes 15–30 minutes, mostly waiting for model downloads (typically 100MB–3GB depending on model size).
What Reddit and OBS Forum Reviewers Say
LocalVocal's OBS Forum rating is 4.27/5 across 11 reviews — strong, but not flawless. Recurring themes from public reviews:
Positive:
- "Setup took about 5 minutes" for basic captions (FiniteSingularity, 5 stars)
- "Does exactly what it says on the tin" (Grumpus, 5 stars)
- "Fully-local implementation of speech-to-text already works very well" (wombat94, 5 stars)
- German streamers praise it for keeping English-speaking viewers with translated captions (EinfachSmon, 4 stars)
Negative:
- Model download stuck at 0% for some users (eserll, 2 stars)
- CPU-only performance is "meh" without AMD/NVIDIA acceleration (Tallicia, 5 stars but noted)
- Occasional caption repetition / buffer not clearing (Tallicia)
- Documentation gaps — "very difficult to find the right model" (EinfachSmon, 4 stars)
These Reddit-adjacent reviews (OBS Forums is where the streaming community discusses plugins before they hit Reddit) suggest LocalVocal is reliable for caption-focused streamers with decent hardware — but not plug-and-play for everyone.
LocalVocal vs StreamTranslate: Local Plugin vs Cloud Browser Source
The obs translation debate on Reddit often comes down to LocalVocal vs cloud browser sources like StreamTranslate:
| LocalVocal | StreamTranslate | |
|---|---|---|
| Cost | Free | $14.99–$149/mo |
| Install | Plugin + model download | Browser source URL |
| Processing | Local (CPU/GPU) | Cloud |
| GPU impact on stream | Yes — Whisper runs locally | Zero |
| Privacy | Full local | Audio sent to cloud |
| Languages | 100 (transcription) | 30+ (translation) |
| Twitch extension | ❌ | ✅ (per-viewer language) |
| Offline | ✅ | ❌ |
| Breaks on OBS update? | Sometimes (plugin compatibility) | No (browser source) |
StreamTranslate's OBS Forums listing explicitly targets this comparison: browser sources "never break from an OBS update" and have "zero performance impact."
Reddit rule of thumb: LocalVocal if you have GPU headroom and care about privacy. StreamTranslate if you want 2-minute setup and zero local compute.
LocalVocal vs StreamFluent: Captions vs AI Voice Dubbing
The comparison Reddit rarely makes — because most threads stop at captions — is LocalVocal vs a stream translation service with voice dubbing:
| LocalVocal | StreamFluent | |
|---|---|---|
| Output | Text captions | Dubbed audio + captions |
| OBS integration | Audio filter plugin | OBS plugin + RTMP relay |
| Viewer experience | Read subtitles | Hear translated voice |
| Multi-platform language streams | ❌ | ✅ |
| Voice cloning | ❌ | ✅ |
| Cost | Free | Free tier + paid plans |
| Processing | Local | Cloud |
StreamFluent solves a different problem. LocalVocal answers: "How do I show translated text on my stream?" StreamFluent answers: "How do I reach viewers who don't read subtitles?"
For a Japanese streamer trying to break into English Twitch, captions help. English dubbing changes whether English viewers click in or scroll past. That is why Reddit threads about growing international viewership increasingly mention dubbing tools, not just obs translation plugin recommendations.
When LocalVocal Is the Right Choice
Choose LocalVocal if:
- ✅ You want free obs translation with no monthly fees
- ✅ Privacy is non-negotiable — no cloud audio processing
- ✅ Captions and text translation meet your accessibility goals
- ✅ You have a GPU (NVIDIA CUDA or Apple Silicon) for smooth real-time inference
- ✅ You export
.srtfiles for YouTube VOD subtitles
When to Skip LocalVocal
Look at alternatives if:
- ❌ Your PC already struggles with gaming + streaming (Whisper adds load)
- ❌ You need translated audio, not just translated text
- ❌ You want separate language outputs to Twitch, YouTube, and Kick simultaneously
- ❌ Model downloads fail or you lack disk space for GGML models
- ❌ You want unlimited captions without running local AI (StreamFluent free tier)
LocalVocal Roadmap (What's Coming)
According to the OBS Forums listing, planned features include:
- More robust built-in translation options
- Additional subtitle formats (
.vtt,.ssa,.sub) - Speaker diarization (detecting multiple speakers)
Notably absent from the roadmap: voice dubbing or multi-destination language audio. LocalVocal is committed to the caption layer — which is the right scope for a local plugin, but limits its usefulness for growth-focused streamers.
The Best OBS Translation Stack in 2026
Reddit's obs translation advice often treats tools as mutually exclusive. They are not. A practical stack:
- LocalVocal — local backup captions if cloud service drops
- StreamTranslate — quick subtitle overlay via browser source + Twitch extension
- StreamFluent — AI voice dubbing to separate language channels
Most streamers need only one. The decision tree:
Need dubbed audio for international viewers?
├── Yes → StreamFluent (OBS plugin or RTMP relay)
└── No → Need zero cloud dependency?
├── Yes → LocalVocal
└── No → Need fastest setup?
├── Yes → StreamTranslate browser source
└── No → LocalVocal (free) or StreamFluent (unlimited free captions)
Bottom Line
LocalVocal remains the best free obs translation plugin for local, privacy-first captioning. Reddit and OBS Forums love it for good reason — 128,000 downloads do not lie.
But if your goal is not captions — if it is growing an audience in another language — LocalVocal is one layer of the stack, not the whole answer. Cloud stream translation services like StreamTranslate (subtitles) and StreamFluent (AI dubbing) address the discoverability problem LocalVocal was never designed to solve.
Get LocalVocal: OBS Forums · GitHub
Compare cloud options: StreamTranslate · StreamFluent
Review based on LocalVocal v0.5.3, OBS Forums reviews, and publicly listed competitor features as of July 2026.