Supported languages

The real-time API accepts ISO-639-1 language codes (en, es, zh, …). Regional tags are accepted (en-US, pt-BR) — only the primary subtag is used.

Input (sourceLanguage)

Languages you can speak. Pass auto to let the ASR detect the spoken language; the detected code is returned on every transcript frame as detected_language.

Code Language
auto Auto-detect
zh Chinese (Mandarin)
yue Cantonese
en English
fr French
de German
it Italian
ja Japanese
ko Korean
pt Portuguese
ru Russian
es Spanish

Output — translated text (targetLanguage with audioOutputEnabled=false)

Languages you can receive as text transcripts.

Code Language
ar Arabic
zh Chinese
cs Czech
nl Dutch
en English
fr French
de German
hi Hindi
id Indonesian
it Italian
ja Japanese
ko Korean
pl Polish
pt Portuguese
ru Russian
es Spanish
th Thai
tr Turkish
vi Vietnamese

Output — translated speech (targetLanguage with audioOutputEnabled=true)

Languages you can receive as translated audio.

Code Language Voices
zh Chinese male, female
en English male, female
fr French male, female
de German male, female
it Italian male, female
ja Japanese male, female
ko Korean male, female
pt Portuguese male, female
ru Russian male, female
es Spanish male, female

Requesting an unsupported targetLanguage with audioOutputEnabled=true returns an error frame. Pass audioOutputEnabled=false to get transcripts in any of the text-output languages above.