Spanish to French speech-to-text translation API

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

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Production-ready Spanish to French translation API

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

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

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

Real-time Spanish to French translation

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

Live Transcription

SpanishTranscript

FrenchTranslation

One-way translation

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

YouTube

Two-way Spanish and French 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

Spanish

Spanish and French 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": "es",
    "target_language": "fr"
  }
}

A breakthrough in real-time Spanish to French translation

Translate before the sentence ends

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

Directional es to fr streaming

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

Native-speaker Spanish STT accuracy

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

Names, numbers, and domain terms

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

Spanish to French 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 Spanish to French 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 Spanish 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 Spanish to any language

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

Frequently asked questions

How do I translate Spanish to French with the API?

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

Is Spanish to French translation real-time?

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

What about translating French to Spanish?

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

Spanish and French 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 Spanish dialects and accents?

Yes. Soniox handles Spanish dialects like Castilian, Latin American Spanish, and Andalusian in a single model, so French translation stays accurate across regions.

Which other providers support Spanish to French?

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

How fast is Spanish to French translation?

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

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Documentation

Get up and running in minutes and spend your time building, 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.

Pricing details