French to Spanish speech-to-text translation API

Stream French (Français) speech and get Spanish (Español) back in real time. One WebSocket, ISO codes fr to es, and ultra-low latency for voice agents and live apps.

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Production-ready French to Spanish translation API

Real French speech includes accents, regional dialects, code switching, and domain-specific vocabulary. Soniox recognizes it in a single model and streams Spanish while the speaker is still talking.

French and Spanish both belong to the Indo-European > Romance > Western Romance family, so cognates and shared structure carry over cleanly into the translated Spanish output.

Soniox preserves formatting in the translated transcript, including names, numbers, addresses, IDs, and domain-specific terms.

Real-time French to Spanish translation

Soniox streams the French transcript and the Spanish translation on the same connection, word by word, so meaning lands while the speaker is still talking.

Live Transcription

FrenchTranscript

SpanishTranslation

One-way translation

Translate live French into Spanish. Everyone in the conversation sees the same translated stream.

YouTube

Two-way French and Spanish conversation

Each side speaks naturally and hears the other in their own language. Use it for live interpreters, bilingual voice agents, travel assistants, and customer support.

Live Conversation

French

French and Spanish through a single stream

Set the source and target codes once. Transcript and translation arrive interleaved on one labeled token stream, with no extra round trip.

config.json

{
  "model": "stt-rt-v5",
  "translation": {
    "type": "one_way",
    "source_language": "fr",
    "target_language": "es"
  }
}

A breakthrough in real-time French to Spanish translation

Translate before the sentence ends

Spanish meaning lands as French is spoken, not after the caption catches up.

Directional fr to es streaming

Set the source and target codes once. Both arrive in a single labeled token stream.

Native-speaker French STT accuracy

Accurate Spanish translation starts with accurate French recognition across accents and language switching.

Names, numbers, and domain terms

Preserved across the pair, including phone numbers, emails, and IDs.

French to Spanish translation is built on top of the Soniox Speech-to-Text API. Turn it on by adding a translation block to your request.

Explore the translation docs

Estimate your French to Spanish translation cost

Set your monthly audio volume to estimate your Soniox API cost for real-time speech-to-text translation.

Pricing calculator

Stop overpaying for French speech AI

Sonioxvs

1,000 hours of audio / month

1025501002505001k2.5k5k10k100k

Pricing assumptions

Based on public pay-as-you-go pricing. Enterprise discounts and committed-use contracts may differ. Some providers charge separately for certain features. The calculator uses the public price for the provider configuration that most closely matches Soniox.

Translate French to any language

From French to Spanish, or French to any of 60+ supported languages. All real-time.

Frequently asked questions

How do I translate French to Spanish with the API?

Add a translation block to your real-time request with source_language "fr" and target_language "es". Soniox transcribes French and streams the Spanish translation over the same WebSocket.

Is French to Spanish translation real-time?

Yes. Soniox streams Spanish while French is still being spoken, so meaning arrives mid-sentence instead of after the sentence ends.

What about translating Spanish to French?

That direction is supported too. See the Spanish to French page, or use two-way translation to run both directions in one session.

French and Spanish are both Indo-European > Romance > Western Romance — does that affect quality?

Shared family structure and cognates generally help. Soniox uses the same model for every pair, so quality stays consistent whether the languages are closely related or not.

Does Soniox handle French dialects and accents?

Yes. Soniox handles French dialects like Metropolitan French, Canadian French, and Belgian French in a single model, so Spanish translation stays accurate across regions.

Which other providers support French to Spanish?

Based on their public docs, OpenAI, Google, Azure, and Speechmatics list both French and Spanish for real-time translation. Soniox is the only one that also supports two-way live translation across 60+ languages.

How fast is French to Spanish translation?

Soniox streams Spanish as French is being spoken, with ultra-low latency. Translation arrives before the sentence ends.

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Documentation

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See what you’ll pay

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

Pricing details