New: Soniox v5 Real-Time is here
Build with API

Czech to Spanish speech translation API

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

Trusted by teams building global voice products

Production-ready Czech to Spanish translation API

Real Czech 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.

Czech (Indo-European > Slavic > West Slavic) and Spanish (Indo-European > Romance > Western Romance) come from different language families, so word order and morphology differ. Soniox reorders meaning in-stream instead of word by word.

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

A breakthrough in real-time Czech to Spanish translation

Translate before the sentence ends

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

Directional cs to es streaming

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

High quality Spanish output

Same model across every language, including historically underserved ones.

Native-speaker Czech STT accuracy

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

Names, numbers, and domain terms

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

config.json
{
  "model": "stt-rt-v5",
  "translation": {
    "type": "one_way",
    "source_language": "cs",
    "target_language": "es"
  }
}

Czech and Spanish through a single stream

Czech to Spanish translation is built on top of Soniox Speech-to-Text API. Every spoken word is transcribed, and Spanish translation streams mid-sentence in the same labeled token stream.

Turn it on by adding a translation block with source_language: "cs" and target_language: "es". It runs on the same WebSocket and the same model, with no extra round trip.

Live Czech to Spanish: written and spoken

Czech to Spanish speech-to-text

Live Czech speechSpanish text

Translate live Czech into written Spanish with the Soniox STT API. Soniox streams the Czech transcript and the Spanish translation as speech happens.

Use it for Spanish captions, subtitles, meeting translation, agent assist, and multilingual transcription.

Czech to Spanish speech-to-speech

Live Czech speechSpoken Spanish

Build full spoken Czech to Spanish translation by combining Soniox STT and Soniox TTS. Soniox recognizes Czech, translates it, and speaks Spanish with low latency.

Use it for live interpreters, bilingual voice agents, travel assistants, and customer support.

Live Czech to Spanish translation in action

Stream Czech to Spanish one-way to push all speech into Spanish, or two-way to keep a bilingual conversation flowing between the two languages.

Czech speaker says: “Chci zaplatit contactless.”
Translated into Spanish in real time.

One-way translation

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

Ideal for live captions, multilingual meetings, broadcasts, lectures, and customer calls.

Czech speaker talks in Czech.
Spanish speaker hears Spanish.
Spanish speaker replies in Spanish.
Czech speaker hears Czech.

Two-way translation

Translate between Czech and Spanish for live bilingual conversation. Each side speaks naturally and hears the other in their own language.

Soniox supports real-time two-way translation between any two of 60+ supported languages.

Accurate on both ends of the pair

Soniox transcribes Czech at 1.25% word error rate and Spanish at 1.25% word error rate. Accurate recognition on both sides is what makes the translation reliable.

Speech-to-Text

Native-speaker accuracy across 60+ languages, with support for multilingual speech, alphanumerics, speaker diarization, context.

Translation

Real-time streaming translation across 3,600 language pairs, built for high quality and low delay across all supported languages.

Text-to-speech

High-fidelity speech generation in 60+ languages, built for names, alphanumerics, language switching, and ultra-low-latency streaming.

Together, they create a complete real-time low-latency speech AI platform.

About Czech and Spanish

Czech has roughly 10,500,000 speakers across Czech Republic. Spanish has roughly 500,000,000 speakers across Spain, Mexico, Colombia, and Argentina.

Czech uses a diacritical orthography system introduced by Jan Hus in the early 15th century.

Spanish is the second most spoken language in the world by native speakers, after Mandarin Chinese.

Soniox makes Czech to Spanish usable in real-time translation across every supported pair.

Translate Czech to any language

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

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPersianPolishPortuguesePunjabiRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnameseWelsh

Frequently asked questions

How do I translate Czech to Spanish with the API?
Add a translation block to your real-time request with source_language "cs" and target_language "es". Soniox transcribes Czech and streams the Spanish translation over the same WebSocket.
Is Czech to Spanish translation real-time?
Yes. Soniox streams Spanish while Czech is still being spoken, so meaning arrives mid-sentence instead of after the sentence ends.
What about translating Spanish to Czech?
That direction is supported too. See the Spanish to Czech page, or use two-way translation to run both directions in one session.
Does Soniox handle Czech dialects and accents?
Yes. Soniox handles Czech dialects like Bohemian, Moravian, and Silesian in a single model, so Spanish translation stays accurate across regions.
Which other providers support Czech to Spanish?
Based on their public docs, OpenAI, Azure, and Speechmatics list both Czech and Spanish for real-time translation. Soniox is the only one that also supports two-way live translation across 60+ languages.
How fast is Czech to Spanish translation?
Soniox streams Spanish as Czech is being spoken, with ultra-low latency. Translation arrives before the sentence ends.

Simple, usage-based pricing

Translate live audio from Czech to Spanish from ~$0.18/hour.

Translation is already built into Soniox Speech-to-Text API. When turned on, it adds about ~$0.06/hour in output token costs.

View pricing

Ready to get started?

Create an account instantly, or contact us to design a custom package for your business.

Build with API

Documentation

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

Explore docs

See what you’ll pay

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

Pricing details