Welsh to English speech-to-text translation API

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

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Production-ready Welsh to English translation API

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

Welsh (Indo-European > Celtic > Brittonic) and English (Indo-European > Germanic > West Germanic) 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.

Real-time Welsh to English translation

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

Live Transcription

WelshTranscript

EnglishTranslation

One-way translation

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

YouTube

Two-way Welsh and English 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

Welsh

Welsh and English 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": "cy",
    "target_language": "en"
  }
}

A breakthrough in real-time Welsh to English translation

Translate before the sentence ends

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

Directional cy to en streaming

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

Native-speaker Welsh STT accuracy

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

Names, numbers, and domain terms

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

Welsh to English 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 Welsh to English 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 Welsh speech AI

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1,000 hours of audio / month

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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 Welsh to any language

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

Frequently asked questions

How do I translate Welsh to English with the API?

Add a translation block to your real-time request with source_language "cy" and target_language "en". Soniox transcribes Welsh and streams the English translation over the same WebSocket.

Is Welsh to English translation real-time?

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

What about translating English to Welsh?

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

Does Soniox handle Welsh dialects and accents?

Yes. Soniox handles Welsh dialects like North Welsh (Gogledd) and South Welsh (De) in a single model, so English translation stays accurate across regions.

Which other providers support Welsh to English?

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

How fast is Welsh to English translation?

Soniox streams English as Welsh 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

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