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Korean to Vietnamese speech translation API

Stream Korean (한국어) speech and get Vietnamese (Tiếng Việt) back in real time. One WebSocket, ISO codes ko to vi, and ultra-low latency for voice agents and live apps.

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Production-ready Korean to Vietnamese translation API

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

Korean (Koreanic) and Vietnamese (Austroasiatic > Vietic) come from different language families, so word order and morphology differ. Soniox reorders meaning in-stream instead of word by word.

Korean is written in Hangul and Vietnamese in Latin, so Soniox emits correctly scripted Vietnamese text.

A breakthrough in real-time Korean to Vietnamese translation

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Translate before the sentence ends

Vietnamese meaning lands as Korean is spoken, not after the caption catches up.

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Directional ko to vi streaming

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

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High quality Vietnamese output

Same model across every language, including historically underserved ones.

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Native-speaker Korean STT accuracy

Accurate Vietnamese translation starts with accurate Korean 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": "ko",
    "target_language": "vi"
  }
}

Korean and Vietnamese through a single stream

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

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

Live Korean to Vietnamese: written and spoken

Korean to Vietnamese speech-to-text

micLive Korean speecharrow_right_altsubjectVietnamese text

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

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

Korean to Vietnamese speech-to-speech

micLive Korean speecharrow_right_altvolume_upSpoken Vietnamese

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

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

Live Korean to Vietnamese translation in action

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

voice_selection
Korean speaker says: “카톡 방에 공지 올렸으니까 시간 되면 바로 check 해줘.”
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Translated into Vietnamese in real time.

One-way translation

Translate live Korean into Vietnamese. Everyone in the conversation sees the same translated stream.

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

voice_selection
Korean speaker talks in Korean.
hearing
Vietnamese speaker hears Vietnamese.
voice_selection
Vietnamese speaker replies in Vietnamese.
hearing
Korean speaker hears Korean.

Two-way translation

Translate between Korean and Vietnamese 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 Korean at 4.3% word error rate and Vietnamese at 5.4% 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.

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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.

quiz
About Korean and Vietnamese

Korean has roughly 81,700,000 speakers across South Korea, North Korea, and United States. Vietnamese has roughly 95,000,000 speakers across Vietnam.

The Korean alphabet, Hangul, was created in 1443 by King Sejong the Great to promote literacy.

Vietnamese was historically written in Chinese characters (Chữ Hán) and a modified form called Chữ Nôm.

Soniox makes Korean to Vietnamese usable in real-time translation across every supported pair.

Translate Korean to any language

From Korean to Vietnamese, or Korean to any of 60+ supported languages. All real-time.

AfrikaansAlbanianArabicAzerbaijaniBasqueBelarusianBengaliBosnianBulgarianCatalanChineseCroatianCzechDanishDutchEnglishEstonianFinnishFrenchGalicianGermanGreekGujaratiHebrewHindiHungarianIndonesianItalianJapaneseKannadaKazakhLatvianLithuanianMacedonianMalayMalayalamMarathiNorwegianPersianPolishPortuguesePunjabiRomanianRussianSerbianSlovakSlovenianSpanishSwahiliSwedishTagalogTamilTeluguThaiTurkishUkrainianUrduVietnameseWelsh

Related translation pages

swap_horizTranslate Vietnamese to Koreanarrow_right_alttranslateKorean speech translationarrow_right_alttranslateVietnamese speech translationarrow_right_alt

Frequently asked questions

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

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