API Docs

Languages

Language Overview
Common Languages
Language Code Format
Full Language List
TTS Voice Synthesis Support List (154)
Speaker Diarization Support List (31)
Languages Without Translation Support

Language Overview

Item	Count
Total speech recognition languages	145
TTS voice synthesis support	154 (325 voices in total)
Speaker diarization support	31
No translation support	2

The TTS language count (154) is greater than STT (145) because the speech service additionally provides 13 TTS-only locales (4 zh-CN dialects: zh-CN-henan / zh-CN-guangxi / zh-CN-liaoning / zh-CN-shaanxi; others: bn-BD, ta-LK / ta-MY / ta-SG, ur-PK, su-ID, sr-Latn-RS, iu-Cans-CA, iu-Latn-CA). At the same time, there are 4 locales supported by STT but not by TTS (it-CH, ar-IL, ar-PS, en-GH). The math: 154 = 141 (STT∩TTS) + 13 (TTS-only).

Feature Notes

Speech-to-Text (STT): All 145 languages are supported
Speech Translation: 143 languages are supported (jv-ID Javanese and wuu-CN Wu Chinese are not supported)
TTS Voice Synthesis: 154 languages are supported, with 325 voices in total
Speaker Diarization: 31 languages are supported

Common Languages

Code	Language	TTS	Speaker Diarization
`zh-TW`	Traditional Chinese (Taiwan)	Yes	Yes
`zh-CN`	Simplified Chinese (China)	Yes	Yes
`zh-HK`	Cantonese (Hong Kong)	No	Yes
`en-US`	English (United States)	Yes	Yes
`en-GB`	English (United Kingdom)	Yes	Yes
`ja-JP`	Japanese	Yes	Yes
`ko-KR`	Korean	Yes	Yes
`fr-FR`	French	Yes	Yes
`de-DE`	German	Yes	Yes
`es-ES`	Spanish	Yes	Yes
`pt-BR`	Portuguese (Brazil)	Yes	Yes
`it-IT`	Italian	Yes	Yes
`nl-NL`	Dutch	No	Yes
`ru-RU`	Russian	No	Yes
`th-TH`	Thai	Yes	Yes
`vi-VN`	Vietnamese	Yes	No
`id-ID`	Indonesian	Yes	No

Language Code Format

All language parameters use the BCP 47 international standard format:

{language-code}-{region-code}

Examples:

zh-TW → Traditional Chinese (Taiwan)
en-US → English (United States)
ja-JP → Japanese (Japan)

Note: Do not use short codes (such as en or ja). You must use the full format (such as en-US or ja-JP).

Full Language List

Chinese Languages (7)

Code	Display Name	TTS	Speaker Diarization
`zh-TW`	Traditional Chinese	Yes	Yes
`zh-CN`	Simplified Chinese	Yes	Yes
`zh-HK`	Cantonese (Traditional)	No	Yes
`yue-CN`	Cantonese (Simplified)	No	No
`zh-CN-shandong`	Chinese (Ji-Lu Mandarin)	Yes	No
`zh-CN-sichuan`	Chinese (Southwestern Mandarin)	Yes	No
`wuu-CN`	Wu Chinese	No	No

English Languages (15)

Code	Display Name	TTS	Speaker Diarization
`en-US`	English (United States)	Yes	Yes
`en-GB`	English (United Kingdom)	Yes	Yes
`en-AU`	English (Australia)	No	Yes
`en-CA`	English (Canada)	No	Yes
`en-IN`	English (India)	No	Yes
`en-NZ`	English (New Zealand)	No	Yes
`en-HK`	English (Hong Kong)	No	No
`en-IE`	English (Ireland)	No	No
`en-SG`	English (Singapore)	No	No
`en-PH`	English (Philippines)	No	No
`en-ZA`	English (South Africa)	No	No
`en-GH`	English (Ghana)	No	No
`en-KE`	English (Kenya)	No	No
`en-NG`	English (Nigeria)	No	No
`en-TZ`	English (Tanzania)	No	No

East Asian Languages (3)

Code	Display Name	TTS	Speaker Diarization
`ja-JP`	Japanese	Yes	Yes
`ko-KR`	Korean	Yes	Yes
`mn-MN`	Mongolian	No	No

Western European Languages (20)

Code	Display Name	TTS	Speaker Diarization
`de-DE`	German	Yes	Yes
`de-AT`	German (Austria)	No	No
`de-CH`	German (Switzerland)	No	No
`fr-FR`	French	Yes	Yes
`fr-CA`	French (Canada)	No	Yes
`fr-BE`	French (Belgium)	No	No
`fr-CH`	French (Switzerland)	No	No
`it-IT`	Italian	Yes	Yes
`it-CH`	Italian (Switzerland)	No	No
`nl-NL`	Dutch	No	Yes
`nl-BE`	Dutch (Belgium)	No	No
`pt-BR`	Portuguese (Brazil)	Yes	Yes
`pt-PT`	Portuguese	No	Yes
`el-GR`	Greek	No	No
`ca-ES`	Catalan	No	No
`eu-ES`	Basque	No	No
`gl-ES`	Galician	No	No
`cy-GB`	Welsh	No	No
`ga-IE`	Irish	No	No
`mt-MT`	Maltese	No	No

Spanish Languages (22)

Code	Display Name	TTS	Speaker Diarization
`es-ES`	Spanish	Yes	Yes
`es-MX`	Spanish (Mexico)	No	Yes
`es-AR`	Spanish (Argentina)	No	No
`es-BO`	Spanish (Bolivia)	No	No
`es-CL`	Spanish (Chile)	No	No
`es-CO`	Spanish (Colombia)	No	No
`es-CR`	Spanish (Costa Rica)	No	No
`es-CU`	Spanish (Cuba)	No	No
`es-DO`	Spanish (Dominican Republic)	No	No
`es-EC`	Spanish (Ecuador)	No	No
`es-GQ`	Spanish (Equatorial Guinea)	No	No
`es-GT`	Spanish (Guatemala)	No	No
`es-HN`	Spanish (Honduras)	No	No
`es-NI`	Spanish (Nicaragua)	No	No
`es-PA`	Spanish (Panama)	No	No
`es-PE`	Spanish (Peru)	No	No
`es-PR`	Spanish (Puerto Rico)	No	No
`es-PY`	Spanish (Paraguay)	No	No
`es-SV`	Spanish (El Salvador)	No	No
`es-US`	Spanish (United States)	No	No
`es-UY`	Spanish (Uruguay)	No	No
`es-VE`	Spanish (Venezuela)	No	No

Nordic Languages (8)

Code	Display Name	TTS	Speaker Diarization
`sv-SE`	Swedish	No	Yes
`da-DK`	Danish	No	Yes
`fi-FI`	Finnish	No	Yes
`nb-NO`	Norwegian	No	Yes
`is-IS`	Icelandic	No	No
`et-EE`	Estonian	No	No
`lt-LT`	Lithuanian	No	No
`lv-LV`	Latvian	No	No

Eastern European Languages (20)

Code	Display Name	TTS	Speaker Diarization
`ru-RU`	Russian	No	Yes
`pl-PL`	Polish	No	Yes
`cs-CZ`	Czech	No	No
`sk-SK`	Slovak	No	No
`hu-HU`	Hungarian	No	No
`ro-RO`	Romanian	No	No
`bg-BG`	Bulgarian	No	No
`uk-UA`	Ukrainian	No	No
`hr-HR`	Croatian	No	No
`sr-RS`	Serbian	No	No
`sl-SI`	Slovenian	No	No
`bs-BA`	Bosnian	No	No
`mk-MK`	Macedonian	No	No
`sq-AL`	Albanian	No	No
`hy-AM`	Armenian	No	No
`ka-GE`	Georgian	No	No
`az-AZ`	Azerbaijani	No	No
`kk-KZ`	Kazakh	No	No
`uz-UZ`	Uzbek	No	No
`am-ET`	Amharic	No	No

Southeast Asian Languages (9)

Code	Display Name	TTS	Speaker Diarization
`th-TH`	Thai	Yes	Yes
`vi-VN`	Vietnamese	Yes	No
`id-ID`	Indonesian	Yes	No
`ms-MY`	Malay	No	No
`fil-PH`	Filipino	No	No
`km-KH`	Khmer	No	No
`lo-LA`	Lao	No	No
`my-MM`	Burmese	No	No
`jv-ID`	Javanese	No	No

South Asian Languages (14)

Code	Display Name	TTS	Speaker Diarization
`hi-IN`	Hindi	No	Yes
`bn-IN`	Bengali	No	No
`ta-IN`	Tamil	No	No
`te-IN`	Telugu	No	No
`mr-IN`	Marathi	No	No
`gu-IN`	Gujarati	No	No
`kn-IN`	Kannada	No	No
`ml-IN`	Malayalam	No	No
`pa-IN`	Punjabi	No	No
`or-IN`	Odia	No	No
`as-IN`	Assamese	No	No
`ur-IN`	Urdu	No	No
`ne-NP`	Nepali	No	No
`si-LK`	Sinhala	No	No

Middle Eastern Languages (4)

Code	Display Name	TTS	Speaker Diarization
`tr-TR`	Turkish	No	Yes
`he-IL`	Hebrew	No	No
`fa-IR`	Persian	No	No
`ps-AF`	Pashto	No	No

Arabic Languages (18)

Code	Display Name	TTS	Speaker Diarization
`ar-EG`	Arabic (Egypt)	No	Yes
`ar-SA`	Arabic (Saudi Arabia)	No	Yes
`ar-AE`	Arabic (UAE)	No	No
`ar-BH`	Arabic (Bahrain)	No	No
`ar-DZ`	Arabic (Algeria)	No	No
`ar-IL`	Arabic (Israel)	No	No
`ar-IQ`	Arabic (Iraq)	No	No
`ar-JO`	Arabic (Jordan)	No	No
`ar-KW`	Arabic (Kuwait)	No	No
`ar-LB`	Arabic (Lebanon)	No	No
`ar-LY`	Arabic (Libya)	No	No
`ar-MA`	Arabic (Morocco)	No	No
`ar-OM`	Arabic (Oman)	No	No
`ar-PS`	Arabic (Palestine)	No	No
`ar-QA`	Arabic (Qatar)	No	No
`ar-SY`	Arabic (Syria)	No	No
`ar-TN`	Arabic (Tunisia)	No	No
`ar-YE`	Arabic (Yemen)	No	No

African Languages (5)

Code	Display Name	TTS	Speaker Diarization
`af-ZA`	Afrikaans	No	No
`zu-ZA`	Zulu	No	No
`sw-KE`	Swahili (Kenya)	No	No
`sw-TZ`	Swahili (Tanzania)	No	No
`so-SO`	Somali	No	No

TTS Voice Synthesis Support List (154)

VAS TTS is fully aligned with the speech service's monolingual neural voice list (including GA and Preview). There are 154 languages in total, offering 325 voices to choose from.

Correspondence with STT

Supported by both STT and TTS: Of the 145 STT locales, 141 also support TTS (excluding it-CH, ar-IL, ar-PS, and en-GH, which are not supported by TTS)
TTS-only support: An additional 13 locales are not supported by STT but are supported by TTS
- Chinese dialects: zh-CN-henan, zh-CN-guangxi, zh-CN-liaoning, zh-CN-shaanxi
- Other languages: bn-BD, ta-LK, ta-MY, ta-SG, ur-PK, su-ID, sr-Latn-RS, iu-Cans-CA, iu-Latn-CA

You can query the available voices for a specific language via GET /api/v1/tts/voices?language={code}:

Code	Language	Available Voices
`zh-TW`	Traditional Chinese	3
`zh-CN`	Simplified Chinese	4
`en-US`	English (United States)	6
`en-GB`	English (United Kingdom)	3
`ja-JP`	Japanese	4
`ko-KR`	Korean	4
`fr-FR`	French	3
`de-DE`	German	3
`es-ES`	Spanish	3
`it-IT`	Italian	3
`pt-BR`	Portuguese (Brazil)	3
`th-TH`	Thai	3
`vi-VN`	Vietnamese	2
`id-ID`	Indonesian	2

The 14 locales above, with 46 voices in total, are a popular-picks summary. The complete set of 154 locales × 325 voices should be confirmed via an actual API query.

Query the voice list: Use GET /api/v1/tts/voices?language={language-code} to retrieve all available voices for that language.

Speaker Diarization Support List (31)

The following languages support the speaker diarization feature:

Language Group	Supported Languages
Chinese	`zh-TW`, `zh-CN`, `zh-HK`
English	`en-US`, `en-GB`, `en-AU`, `en-CA`, `en-IN`, `en-NZ`
Japanese/Korean	`ja-JP`, `ko-KR`
Western European	`de-DE`, `fr-FR`, `fr-CA`, `it-IT`, `nl-NL`, `pt-BR`, `pt-PT`
Spanish	`es-ES`, `es-MX`
Nordic	`sv-SE`, `da-DK`, `fi-FI`, `nb-NO`
Eastern European	`ru-RU`, `pl-PL`
Middle Eastern	`tr-TR`, `ar-EG`, `ar-SA`
South Asian	`hi-IN`
Southeast Asian	`th-TH`

Languages Without Translation Support

Code	Display Name	Description
`jv-ID`	Javanese	Speech-to-text only; speech translation not supported
`wuu-CN`	Wu Chinese	Speech-to-text only; speech translation not supported

Version: V1.5.7 Last Updated: 2026-05-20

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