Every language task.
One API call.
Translate, transcribe, synthesize speech, interpret, and caption across 300+ languages — with optional human review baked into the same request.
POST api.languu.com/v1/translateLanguages live
Translation accuracy
Endpoints, one key
Monthly uptime SLA
Five products that speak the same protocol.
No SDK juggling, no stitching three vendors together. Auth once, then hit any endpoint with the same request shape and consistent JSON back.
Translation
Context-aware text and document translation with formal/informal tone, custom glossaries, and full-page mode.
POST text · docx · htmlTranscription
Speaker-labeled, timestamped transcripts from audio or video, returned as JSON, plain text, or subtitle tracks.
POST mp3 · wav · mp4Text to Speech
Natural multilingual voices with adjustable pace and emphasis. Stream the audio or fetch a hosted file.
POST mp3 · wav · streamCaptioning
Burned-in or sidecar captions, translated and time-synced. Export ready-to-ship SRT and VTT files.
POST srt · vttAI Interpretation
Low-latency speech-to-speech interpretation for live calls and events over a single streaming socket.
WSS realtimeHuman-in-the-loop
Flag any job for native-speaker review. Get a webhook the moment a human verifies your output.
POST optional · asyncReadable on the first try.
The same call in your stack of choice. Predictable fields, ISO language codes, and errors that tell you what to fix.
curl https://api.languu.com/v1/translate \ -H "Authorization: Bearer $LANGUU_KEY" \ -H "Content-Type: application/json" \ -d { "text": "Your subscription renews tomorrow.", "source": "auto", "target": "ko", "tone": "formal", "review": "none" }
import languu client = languu.Client(api_key=os.environ["LANGUU_KEY"]) res = client.translate.create( text="Your subscription renews tomorrow.", source="auto", target="ko", tone="formal", ) print(res.translation) # 구독이 내일 갱신됩니다.
import Languu from "languu"; const client = new Languu(process.env.LANGUU_KEY); const res = await client.translate.create({ text: "Your subscription renews tomorrow.", source: "auto", target: "ko", tone: "formal", }); console.log(res.translation);
{
"id": "txn_9f2a71c4",
"translation": "구독이 내일 갱신됩니다.",
"detected_source": "en",
"target": "ko",
"tone": "formal",
"confidence": 0.99,
"characters": 34,
"review": null
}One vendor instead of four.
Most teams glue a translation API to a separate transcription tool, a TTS service, and a captioning vendor. LANGUU is all of it behind one key — with compliance the free tools don't carry.
* Comparison reflects typical single-purpose API offerings. Capabilities vary by provider and plan.
The plumbing you'd build anyway.
Production primitives included from day one, so you ship features instead of wiring infrastructure.
Async jobs & webhooks
Submit long media, get a job ID, and receive a signed webhook when the result is ready. No polling required.
Custom glossaries
Lock product names, legal terms, and brand voice with reusable glossaries applied per request.
Batch endpoint
Send thousands of strings or files in a single call and stream results back as they complete.
Real-time streaming
Open a WebSocket for live interpretation and transcription with sub-second partial results.
Format-native output
Return DOCX, SRT, VTT, JSON, or plain text directly — no post-processing on your side.
Idempotency keys
Safe retries with idempotency headers so a flaky network never double-charges or double-runs a job.
Compliant by default. Yours, never sold.
Every request is encrypted in transit and at rest. We never sell your data to third parties, and regulated industries get the certifications they need on the same key.
View security docs →Live in three steps.
From signup to first translation in minutes. The free tier needs no card — add one only when you scale.
Grab a key
Create an account and generate a key from the dashboard. Pass it as a bearer token on every request.
Pick an endpoint
Call /v1/translate, /v1/transcribe, /v1/speak, /v1/caption, or /v1/interpret.
Ship it
Stream the result, set a webhook, or export to your file format. Add human review whenever stakes are high.
Build once.
Speak everywhere.
Get a key in under a minute and make your first call before your coffee cools.