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Welsh to French speech translation API

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

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Production-ready Welsh to French translation API

Real Welsh 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.

Welsh (Indo-European > Celtic > Brittonic) and French (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 Welsh to French translation

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Translate before the sentence ends

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

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Directional cy to fr streaming

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

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High quality French output

Same model across every language, including historically underserved ones.

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Native-speaker Welsh STT accuracy

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

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Names, numbers, and domain terms

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

config.json
{
  "model": "stt-rt-v4",
  "translation": {
    "type": "one_way",
    "source_language": "cy",
    "target_language": "fr"
  }
}

Welsh and French through a single stream

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

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

Live Welsh to French: written and spoken

Welsh to French speech-to-text

micLive Welsh speecharrow_right_altsubjectFrench text

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

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

Welsh to French speech-to-speech

micLive Welsh speecharrow_right_altvolume_upSpoken French

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

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

Live Welsh to French translation in action

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

voice_selection
Welsh speaker says: “Ie, a falle cawn ni bara brith yn y half-time, os nad yw'r siop yn out of stock.”
translate
Translated into French in real time.

One-way translation

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

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

voice_selection
Welsh speaker talks in Welsh.
hearing
French speaker hears French.
voice_selection
French speaker replies in French.
hearing
Welsh speaker hears Welsh.

Two-way translation

Translate between Welsh and French 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 Welsh at 14.3% word error rate and French at 5.7% word error rate. Accurate recognition on both sides is what makes the translation reliable.

speech_to_text

Speech-to-Text

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

translate

Translation

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

text_to_speech

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.

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About Welsh and French

Welsh has roughly 900,000 speakers across United Kingdom. French has roughly 280,000,000 speakers across France, Democratic Republic of Congo, Canada, and Madagascar.

Welsh is one of the oldest living languages in Europe and the most widely spoken Celtic language today.

French was the international language of diplomacy and high culture from the 17th to the mid-20th century.

Soniox makes Welsh to French usable in real-time translation across every supported pair.

Translate Welsh to any language

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

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPersianPolishPortuguesePunjabiRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnamese

Related translation pages

swap_horizTranslate French to Welsharrow_right_alttranslateWelsh speech translationarrow_right_alttranslateFrench speech translationarrow_right_alt

Frequently asked questions

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

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