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Russian to Bulgarian speech translation API

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

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Production-ready Russian to Bulgarian translation API

Real Russian 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.

Russian (Indo-European > Slavic > East Slavic) 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.

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

A breakthrough in real-time Russian to Bulgarian translation

Translate before the sentence ends

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

Directional ru to bg streaming

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

High quality Bulgarian output

Same model across every language, including historically underserved ones.

Native-speaker Russian STT accuracy

Accurate Bulgarian translation starts with accurate Russian 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": "ru",
    "target_language": "bg"
  }
}

Russian and Bulgarian through a single stream

Russian 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: "ru" and target_language: "bg". It runs on the same WebSocket and the same model, with no extra round trip.

Live Russian to Bulgarian: written and spoken

Russian to Bulgarian speech-to-text

Live Russian speechBulgarian text

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

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

Russian to Bulgarian speech-to-speech

Live Russian speechSpoken Bulgarian

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

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

Live Russian to Bulgarian translation in action

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

Russian speaker says: “Кинь, пожалуйста, линк на Google Sheet в наш чат.”
Translated into Bulgarian in real time.

One-way translation

Translate live Russian into Bulgarian. Everyone in the conversation sees the same translated stream.

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

Russian speaker talks in Russian.
Bulgarian speaker hears Bulgarian.
Bulgarian speaker replies in Bulgarian.
Russian speaker hears Russian.

Two-way translation

Translate between Russian 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 Russian at 1.25% word error rate and Bulgarian 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 Russian and Bulgarian

Russian has roughly 258,000,000 speakers across Russia, Belarus, Kazakhstan, and Kyrgyzstan. Bulgarian has roughly 8,000,000 speakers across Bulgaria.

Russian is the most geographically widespread language of Eurasia, spanning 11 time zones.

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

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

Translate Russian to any language

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

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhKoreanLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPersianPolishPortuguesePunjabiRomanianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnameseWelsh

Frequently asked questions

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

Simple, usage-based pricing

Translate live audio from Russian to Bulgarian 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.

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