How to Use the Eleven Multilingual v2 API: text to speech integration guide (2026)
Learn how to call the Eleven Multilingual v2 API on NamiFusion: parameters, pricing (from ≈$0.010) and runnable copy-paste code — try it in the playground first.
Eleven Multilingual v2 is a text to speech model by ElevenLabs: Our most life-like, emotionally rich mode in 29 languages. Best for voice overs, audiobooks, post-production, or any other content creation needs On NamiFusion you can try it in the playground (exact quote shown before you submit), then call it through one unified REST API — a typical run costs about $0.010.
TL;DR
· Task type: text to speech, provided by ElevenLabs
· Pricing: about $0.010 per typical run ($1 = 100 credits), pay-as-you-go
· Getting started: playground (exact quote before submit) → create an API key → one POST request
· Tunable parameters: 4 (see the table below)
· No platform watermark; commercial use allowed (per the Terms of Service)
What can you build with Eleven Multilingual v2?
Voiceovers and narration: generate multi-language voices for short videos, courses and ads.
Audio content production: turn articles, news and fiction into publishable audio at scale.
Product voice interfaces: consistent branded voices for apps and devices.
How do you call this API?
1. Sign up on NamiFusion and create a key on the API Keys page (free credits on signup).
2. Submit a task with the cURL example below, passing your key as a Bearer token.
3. Poll the task status with the returned task_uuid and read the output URLs when completed.
# 1) Submit — returns { "task_uuid": "..." }
curl -X POST "https://www.namifusion.com/api/v1/marketplace/run/eleven_multilingual_v2" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"input": {
"voice_id": "JBFqnCBsd6RMkjVDRZzb",
"language_code": "en",
"similarity_boost": 0.8,
"stability": 0.55
}
}'
# 2) Poll until status is "completed", then read the output URLs
curl "https://www.namifusion.com/api/v1/marketplace/run/tasks/TASK_UUID" \
-H "Authorization: Bearer YOUR_API_KEY"What parameters does it take?
voice_id (声音id): required
language_code (ISO 639-1语言code): optional
similarity_boost (Similarity Boost): optional, default 0.75
stability (Stability): optional, default 0.5
How much does it cost?
Pay-per-use in credits. A typical run costs about $0.010 ($1 = 100 credits); the exact price varies with parameters like resolution or duration, and the playground shows the exact quote before you submit.
Eleven Multilingual v2
A high-naturalness multilingual text-to-speech model built for fast, reliable, and cost-efficient voice generation.
Multilingual V2 is ElevenLabs’ multilingual text-to-speech model for converting written text into clear, expressive speech. It combines natural prosody, strong multilingual performance, no cold starts, and affordable character-based pricing, making it a practical choice for both real-time and production-scale audio generation.
🚀 Key Features
- High naturalness: Produces humanlike intonation, pacing, and timing for polished voice output.
- Multilingual support: Optimized for multilingual synthesis with improved pronunciation and accent handling.
- Tunable voice delivery: Adjust
similarityandstabilityto balance speaker likeness, clarity, and consistency. - Speaker Boost for English normalization: Improves reading quality for numbers, dates, units, and similar structured content.
- No cold starts: Well suited for interactive applications and high-frequency workloads.
- Affordable pricing: Simple per-character pricing supports predictable cost control from prototyping to production.
🛠️ Technical Specifications
| Item | Details |
|---|---|
| Model architecture | Multilingual text-to-speech（TTS） |
| Model ID | elevenlabs/multilingual-v2 |
| Input | Text（string） |
| Output | Audio |
| Maximum input length | 10,000 characters |
| Billing unit | 1 character = 1 token; charged per character |
| Voice selection | voice_id, default Alice; supports built-in and custom voices |
| Similarity control | similarity: 0.0–1.0, default 1 |
| Stability control | stability: 0.0–1.0, default 0.5 |
| English normalization boost | use_speaker_boost: boolean, default true |
| Pause control | Use <#x#> between words to control pause duration（0.01–99.99s） |
| Latency | No fixed public value provided; positioned as no-cold-start, fast inference |
| Typical outputs | Voiceovers, narration, learning content, product videos, customer support audio |
Sample Prompts
Note: This is a text-to-speech model, so the examples below are sample input texts.
Welcome to our product demo. Today we will walk through the key features and benefits in under two minutes.Your order will arrive on Friday <#0.5#> between 2 PM and 5 PM. Thank you for shopping with us.The total balance is 1,245 dollars and 80 cents, due on September 15.
💰 Pricing
| Item | Price |
|---|---|
| Base price | $0.1 / 1,000 characters |
FAQ
Can I try it for free first?+
Signup gives you free credits, but they currently apply only to selected in-app face-swap features — this model is pay-as-you-go. The playground still lets you try it without code, with the exact quote shown before you submit.
Can I use the output commercially? Is there a watermark?+
Yes, outputs are yours to use commercially, and NamiFusion adds no platform watermark — subject to the Terms of Service and applicable law.
What is the content policy?+
NamiFusion is an unfiltered engine: no arbitrary restrictions and NSFW-friendly, but illegal content and non-consensual use of real people are prohibited — see the Terms of Service.
How long does a Eleven Multilingual v2 task take?+
It depends on parameters — images usually take seconds, videos tens of seconds to minutes. The API returns a task_uuid for polling.
What are the resolution and duration limits?+
See the parameter table above — each model lists its available resolution and duration options there and in the playground.