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Welsh to Bulgarian speech translation API

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

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Production-ready Welsh to Bulgarian translation API

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

Welsh (Indo-European > Celtic > Brittonic) and Bulgarian (Indo-European > Slavic > South Slavic) come from different language families, so word order and morphology differ. Soniox reorders meaning in-stream instead of word by word.

Welsh is written in Latin and Bulgarian in Cyrillic, so Soniox emits correctly scripted Bulgarian text.

A breakthrough in real-time Welsh to Bulgarian translation

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Translate before the sentence ends

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

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Directional cy to bg streaming

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

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High quality Bulgarian output

Same model across every language, including historically underserved ones.

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Native-speaker Welsh STT accuracy

Accurate Bulgarian 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": "bg"
  }
}

Welsh and Bulgarian through a single stream

Welsh to Bulgarian translation is built on top of Soniox Speech-to-Text API. Every spoken word is transcribed, and Bulgarian 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: "bg". It runs on the same WebSocket and the same model, with no extra round trip.

Live Welsh to Bulgarian: written and spoken

Welsh to Bulgarian speech-to-text

micLive Welsh speecharrow_right_altsubjectBulgarian text

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

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

Welsh to Bulgarian speech-to-speech

micLive Welsh speecharrow_right_altvolume_upSpoken Bulgarian

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

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

Live Welsh to Bulgarian translation in action

Stream Welsh to Bulgarian one-way to push all speech into Bulgarian, 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 Bulgarian in real time.

One-way translation

Translate live Welsh into Bulgarian. 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
Bulgarian speaker hears Bulgarian.
voice_selection
Bulgarian speaker replies in Bulgarian.
hearing
Welsh speaker hears Welsh.

Two-way translation

Translate between Welsh and Bulgarian 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 Bulgarian at 5.6% 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 Bulgarian

Welsh has roughly 900,000 speakers across United Kingdom. Bulgarian has roughly 8,000,000 speakers across Bulgaria.

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

The Cyrillic alphabet was developed in the First Bulgarian Empire in the 9th century.

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

Translate Welsh to any language

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

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPersianPolishPortuguesePunjabiRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnamese

Related translation pages

swap_horizTranslate Bulgarian to Welsharrow_right_alttranslateWelsh speech translationarrow_right_alttranslateBulgarian speech translationarrow_right_alt

Frequently asked questions

How do I translate Welsh to Bulgarian with the API?arrow_downward
Add a translation block to your real-time request with source_language "cy" and target_language "bg". Soniox transcribes Welsh and streams the Bulgarian translation over the same WebSocket.
Is Welsh to Bulgarian translation real-time?arrow_downward
Yes. Soniox streams Bulgarian while Welsh is still being spoken, so meaning arrives mid-sentence instead of after the sentence ends.
What about translating Bulgarian to Welsh?arrow_downward
That direction is supported too. See the Bulgarian to Welsh page, or use two-way translation to run both directions in one session.
Does Soniox handle Latin to Cyrillic output?arrow_downward
Yes. Soniox outputs correctly scripted Bulgarian text in Cyrillic directly in the token stream.
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 Bulgarian translation stays accurate across regions.
Which other providers support Welsh to Bulgarian?arrow_downward
Based on their public docs, OpenAI and Azure list both Welsh and Bulgarian for real-time translation. Soniox is the only one that also supports two-way live translation across 60+ languages.
How fast is Welsh to Bulgarian translation?arrow_downward
Soniox streams Bulgarian as Welsh is being spoken, with ultra-low latency. Translation arrives before the sentence ends.

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