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Multilingual text-to-speech API for 60+ languages

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For products that speak to a global audience

public

Global customer communication

Speak to customers in their language with natural pronunciation. One API for notifications, confirmations, and support across every market.

translate

Live translation output

Generate natural spoken output from translated text. Pair with speech-to-text translation for end-to-end multilingual voice communication.

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Multilingual content

Produce audio versions of content in multiple languages. Localize documentation, announcements, and guides with accurate pronunciation.

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International support

Serve multilingual support queues with one TTS model. No per-language voice packs or model switching required.

Why Soniox is the best multilingual text-to-speech API

Global products need speech that sounds natural in every language, not just the top five. Most TTS systems deliver uneven quality across languages and fail on mixed-language content.

A multilingual text-to-speech system should:

  • Support 60+ languages with native-quality pronunciation, rhythm, and intonation.
  • Handle language switching mid-sentence without awkward pauses or pronunciation breaks.
  • Pronounce foreign words and names correctly even when embedded in a different language.
  • Deliver consistent quality across all languages, not just a few major ones.
  • Work through one API with no per-language model switching or configuration changes.

Soniox TTS is built for multilingual communication from the ground up. One model handles every language with consistent quality, natural code-switching, and accurate name pronunciation.

With a competitive pricing, Soniox makes it practical to go global with one integration.

One API, every language, native quality

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Native-speaker quality across languages

Soniox generates speech with natural pronunciation, rhythm, and intonation for each language. Not just translated audio, but speech that sounds right to native speakers.

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Seamless code-switching in one utterance

Real-world text mixes languages. Soniox speaks mixed-language sentences naturally, handling transitions without awkward pauses or pronunciation breaks.

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Get names and entities right

Foreign names, brand names, and technical terms are pronounced correctly even when embedded in a different language context.

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One integration for every market

Deploy to any region with the same API. No per-language voice packs, model downloads, or configuration changes.

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equalizer

Consistent quality across all languages

Every language receives the same attention to pronunciation, pacing, and naturalness. No second-class languages.

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Why it works

Global products need TTS that works across languages without compromises. Soniox combines native-quality pronunciation, mid-sentence language switching, accurate name rendering, and consistent quality across 60+ languages in one API.

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Use Soniox in popular frameworks

Soniox integrates seamlessly with leading real-time communication platforms, AI frameworks, automation tools, and developer SDKs.

An open source framework and developer platform for building, testing, deploying, scaling, and observing agents in production.

Open source framework for voice and multimodal conversational AI.

Twilio is a cloud-based customer engagement platform (CPaaS) that provides APIs, allowing developers to integrate voice, messaging (SMS, WhatsApp), email, and authentication capabilities into applications.

Open-source development framework designed to build applications powered by large language models (LLMs).

The open-source AI toolkit designed to help developers build AI-powered applications and agents with React, Next.js, Vue, Svelte, Node.js, and more.

Open-source AI SDK with a unified interface across multiple providers. No vendor lock-in, no proprietary formats.

n8n is a powerful, low-code/pro-code workflow automation tool that connects various applications, APIs, and databases to automate tasks.

Privacy and compliance, built right in

Never stored, never saved.

Audio stays in memory, everything is processed in real-time.

Built for privacy-critical use cases.

Adhering to leading global security, privacy, and compliance standards.

Trusted where privacy matters most.

Used in industries where speech is sensitive, from healthcare to enterprise.

Soniox is Soc 2 Type 2 compliant
Soniox is ISO 27001:2022 compliant
Soniox is HIPAA compliant
Soniox is GDPR compliant
SOC 2 Type 2 · ISO/IEC 27001:2022 · HIPAA · GDPR

Frequently asked questions about multilingual Soniox TTS

How many languages does Soniox TTS support?arrow_downward
Soniox TTS supports 60+ languages with a single model. All languages are available through one API with no per-language configuration changes.
Can Soniox TTS switch languages mid-sentence?arrow_downward
Yes. Soniox handles code-switching naturally within a single utterance. Mixed-language text is spoken with correct pronunciation for each language segment, without awkward pauses or breaks.
How does Soniox pronounce foreign names and words?arrow_downward
Soniox correctly pronounces foreign names, brand names, and borrowed words even when embedded in a different language context. This includes person names, place names, and technical terms.
Do I need separate models for each language?arrow_downward
No. Soniox uses a single unified model for all supported languages. There are no per-language voice packs, model downloads, or configuration changes needed.
Is speech quality consistent across all languages?arrow_downward
Yes. Soniox delivers consistent pronunciation, pacing, and naturalness across all supported languages. There are no second-class languages with degraded quality.
Does multilingual TTS add latency compared to single-language?arrow_downward
No. Soniox delivers consistent streaming performance across all supported languages. There is no latency penalty for using multiple languages or switching between them.
Is Soniox TTS suitable for live translation workflows?arrow_downward
Yes. Soniox TTS can generate spoken output from translated text in real time. Paired with Soniox speech-to-text translation, it enables end-to-end multilingual voice communication.
How do I get started with multilingual TTS?arrow_downward
Generate an API key on Soniox Console and start sending text in any supported language to the TTS API. No additional setup is required for multilingual use.

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Documentation

Get up and running in minutes and spend your time building the product, not wrestling with the API.

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See what you’ll pay

Pay only for what you use with our flexible pricing. Built to scale with you.

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