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Text-to-speech

Language Support

Languages supported by SpeechifyAI Build TTS

SpeechifyAI Build models support synthesizing speech in multiple languages. The API handles both single-language texts and mixed-language inputs.

Use simba-3.5 for any of its 48 languages, or simba-3.0 for its six. simba-multilingual needs a workspace pinned to an API version before 2026-09-21 and is served by Simba 3.5 from 2026-11-21. simba-3.2 and simba-english are English-only; a non-English voice on them returns 400.

Which model covers which languages

ModelLanguages
simba-3.548 languages, any regional variant of each. See Simba 3.5 languages
simba-3.0English plus German, Spanish (Spain and Mexico), French, Italian and Brazilian Portuguese. See Simba 3.0 languages
simba-multilingual (upgraded 2026-11-21)The full 30+ locale set below
simba-3.2, simba-english (the latter upgraded 2026-11-21)English only

Simba 3.5 languages

simba-3.5 is streaming-native and speaks these 48 languages under one model id, on every plan. Send the code as the language parameter, either alone or with any region: pt, pt-BR and pt-PT are all Portuguese, and ja and ja-JP are both Japanese.

LanguageCode
Arabicar
Belarusianbe
Bengalibn
Bosnianbs
Burmesemy
Catalanca
Chinesezh
Croatianhr
Czechcs
Danishda
Dutchnl
Englishen
Finnishfi
Frenchfr
Georgianka
Germande
Greekel
Gujaratigu
Hebrewhe
Hindihi
Hungarianhu
Indonesianid
Italianit
Japaneseja
Kazakhkk
Koreanko
Latinla
Malayms
Marathimr
Norwegianno
Persianfa
Polishpl
Portuguesept
Romanianro
Russianru
Serbiansr
Slovaksk
Sloveniansl
Spanishes
Swedishsv
Tagalogtl
Tamilta
Telugute
Thaith
Turkishtr
Ukrainianuk
Urduur
Vietnamesevi

Every voice in the catalog speaks each of these languages on simba-3.5, your workspace’s cloned voices included. When you omit language, the voice’s own locale decides, so set it whenever the text is not in the voice’s language. A language outside this list is not rejected, but it is not validated either.

Staff picks for every language

Simba 3.5 sounds best with a voice native to the language you generate. Every voice keeps the accent of the recording it was made from, so an English voice reading German sounds like an English speaker speaking German. A cloned voice works the same way: clone from a recording in the language you will use it in.

We kept this on purpose. Customers asked that a voice, and above all their own clone, keeps sounding like itself in every language. We plan to make this more flexible in an upcoming release.

For each language, start with its top voices.

These are our staff picks, the voices we recommend first for each language. In GET /v1/voices, each carries staff_pick_rank: 1 for the first pick of its locale, 2 for the next, and so on. Filter with the full locale, such as de-DE, and start from the lowest staff_pick_rank. The console marks the same voices as staff picks. For a language without a row here, choose a voice whose locale is that language.

LanguageLocaleStaff picks, in order
Arabicar-AE1. Aseel, aseel, female
2. Taym, taym, male
3. Jad, jad, male
Bengalibn-IN1. Ritwik, ritwik, male
2. Tiyasha, tiyasha, female
3. Laboni, laboni, female
Catalanca-ES1. Bernat, bernat, male
2. Mariona, mariona, female
3. Duna, duna, female
4. Roc, roc, male
Chinesezh-CN1. Xùbái, xubai, male
2. Yánchuān, yanchuan, male
3. Tīnglán, tinglan, female
4. Nánxù, nanxu, female
Croatianhr-HR1. Bartol, bartol, male
2. Zrinka, zrinka, female
3. Lada, lada, female
4. Jure, jure, male
Czechcs-CZ1. Hynek, hynek, male
2. Zora, zora, female
3. Agáta, agata, female
4. Vavřinec, vavrinec, male
Danishda-DK1. Cecilie, cecilie, female
2. Preben, preben, male
Dutchnl-NL1. Fenna, fennaa, female
2. Wout, wout, male
3. Siebe, siebe, male
4. Merel, merel, female
5. Wessel, wessel, male
6. Teun, teun, male
Englishen-GB1. Beatrice, beatrice_32, female
2. Imogen, imogen_32, female
3. Edmund, edmund_32, male
4. Hugh, hugh_32, male
Englishen-US1. Harper, harper_32, female
2. Wyatt, wyatt_32, male
3. Geffen, geffen_32, female
4. Dominic, dominic_32, male
5. George, george, male
6. Henry, henry, male
7. Carly, carly, female
8. Oliver, oliver, male
Filipinofil-PH1. Lakan, lakan, male
2. Amihan, amihan, female
3. Mayumi, mayumi, female
4. Bayani, bayani, male
Finnishfi-FI1. Tuuli, tuuli, female
2. Taika, taika, female
3. Otso, otso, male
4. Aatos, aatos, male
Frenchfr-FR1. Isabelle, isabelle-agent, female
2. Romain, romain-agent, male
3. Augustin, augustin-agent, male
Georgianka-GE1. Lasha, lasha, male
2. Tamta, tamta, female
3. Tornike, tornike, male
4. Natia, natia, female
Germande-DE1. Henrik, henrik-agent, male
2. Runa, runa-agent, female
3. Benedikt, benedikt-agent, male
Greekel-GR1. Myrto, myrto, female
2. Ariadni, ariadni, female
3. Fotis, fotis, male
4. Orestis, orestis, male
Gujaratigu-IN1. Kinjal, kinjal, female
2. Chetan, chetan, male
3. Nilesh, nilesh, male
Hebrewhe-IL1. Inbar, inbar, female
2. Lital, lital, female
3. Moshe, moshe, male
Hindihi-IN1. Mihika, mihika, female
2. Shlok, shlok, male
3. Kathan, kathan, male
Hungarianhu-HU1. Levente, levente, male
2. Eszter, eszter, female
3. Bence, bence, male
Indonesianid-ID1. Langit, langit, male
2. Laras, laras, female
3. Bima, bima, male
4. Senja, senja, female
Italianit-IT1. Benedetta, benedetta-agent, female
2. Daniele, daniele-agent, male
3. Rosanna, rosanna, female
4. Stefano, stefano-agent, male
5. Vittoria, vittoria, female
Japaneseja-JP1. Saku, saku, male
2. Tsumugi, tsumugi, female
3. Shiori, shiorii, female
4. Ritsu, ritsu, male
Kazakhkk-KZ1. Abai, abai, male
2. Arlan, arlan, male
3. Tomiris, tomiris, female
4. Zhuldyz, zhuldyz, female
Koreanko-KR1. Da-on, da-on, female
2. Yun-seul, yun-seul, female
3. Han-gyeol, han-gyeol, male
4. Do-yun, do-yun, male
Malayms-MY1. Tuah, tuah, male
2. Melur, melur, female
3. Ilham, ilham, male
4. Kirana, kirana, female
Marathimr-IN1. Revati, revati, female
2. Siddharth, siddharth, male
3. Aishwarya, aishwarya, female
4. Mandar, mandar, male
Norwegiannb-NO1. Frida, frida, female
2. Jakob, jakob, male
Persianfa-IR1. Taraneh, taraneh, female
2. Rudabeh, rudabeh, female
3. Sohrab, sohrab, male
4. Navid, navid, male
Polishpl-PL1. Kajetan, kajetan, male
2. Iga, iga, female
3. Tymon, tymon, male
4. Jagna, jagna, female
Portuguesept-BR1. Fábio, fabio-agent, male
2. Letícia, leticia-agent, female
3. Cristiane, cristiane-agent, female
4. Thiago, thiago, male
5. Patrícia, patricia-agent, female
6. Wesley, wesley, male
Portuguesept-PT1. Madalena, madalena, female
2. Gaspar, gaspar, male
3. Vasco, vasco, male
4. Íris, iris, female
Romanianro-RO1. Alexandru, alexandru, male
2. Viorica, viorica, female
3. Mihai, mihai, male
4. Ioana, ioana, female
Russianru-RU1. Vladimir, tikhon, male
2. Aleksey, savva, male
3. Vasilisa, vasilisa, female
Slovaksk-SK1. Viktória, viktria, female
2. Damián, damin, male
3. Natália, natlia, female
4. Matej, matej, male
Sloveniansl-SI1. Marko, marko, male
2. Julija, julija, female
3. Zala, zala, female
4. Janez, janez, male
Spanishes-ES1. Vega, vega, female
2. Guille, guille, male
3. Unai, unai, male
4. Inés, iness, female
5. Lola, lola, female
Spanishes-MX1. Fidel, fidel-agent, male
2. Gabi, gabi-agent, female
3. Ramón, ramon-agent, male
4. Chuy, chuy-agent, male
Swedishsv-SE1. Signe, signe, female
2. Arvid, arvid, male
3. Elin, elin, female
4. Sixten, sixten, male
Tamilta-IN1. Murugan, murugan, male
2. Revathi, revathi, female
3. Kaviya, kaviya, female
Telugute-IN1. Aadhya, aadhya, female
2. Saanvi, saanvi, female
3. Aarav, aarav, male
4. Venkatesh, venkatesh, male
5. Sai, sai, male
Thaith-TH1. Somchai, somchai, male
2. Kanya, kanya, female
3. Kittisak, kittisak, male
4. Pornthip, pornthip, female
Turkishtr-TR1. Yusuf, yusuf, male
2. Elif, elif, female
Ukrainianuk-UA1. Zoriana, zoriana, female
2. Ostap, ostapp, male
3. Yarema, yarema, male
4. Lesia, lesia, female
Urduur-IN1. Naureen, naureen, female
2. Zubair, zubair, male
3. Noman, noman, male
4. Nazia, nazia, female
Vietnamesevi-VN1. Khánh, lam, male
2. Thanh Diệp, thanh-diep, female
3. Dung, ngon, male
4. An Nhiên, an-nhien, female

Simba 3.0 languages

simba-3.0 is streaming-native and officially supports six languages across these seven locales:

LanguageCode
Englishen-*
Germande-DE
Spanish (Spain)es-ES
Spanish (Mexico)es-MX
Frenchfr-FR
Italianit-IT
Portuguese (Brazil)pt-BR

es-ES and es-MX voices are interchangeable on simba-3.0: pass language: es-ES with an es-MX-labeled voice (or the reverse) and synthesis works either way.

You select the language with the language request parameter; when you omit it, the model is chosen from the voice’s own locale. simba-3.0 routes English to its English training and everything else to its multilingual one, so this is an internal detail: the model ID you pass never changes.

Languages outside this list often still produce usable audio on simba-3.0, but they are not validated or officially supported. For any other language, use simba-3.5.

Fully Supported Languages

The following table describes the legacy simba-multilingual model, not Simba 3. It requires an API version pinned before 2026-09-21; from 2026-11-21, that ID is served by Simba 3.5. For current integrations, use the Simba 3.5 languages above.

LanguageCode
Englishen
Frenchfr-FR
Germande-DE
Spanishes-MX
Portuguese (Brazil)pt-BR
Portuguese (Portugal)pt-PT

Beta Languages

These are the beta languages of the legacy simba-multilingual model. They are not a list of supported Simba 3 languages. The same retirement (2026-09-21) and replacement-training (2026-11-21) dates apply.

LanguageCode
Arabicar-AE
Bengalibn-IN
Cantoneseyue-CN
Danishda-DK
Dutchnl-NL
Estonianet-EE
Finnishfi-FI
Greekel-GR
Gujaratigu-IN
Hebrewhe-IL
Hindihi-IN
Italianit-IT
Japaneseja-JP
Koreanko-KR
Marathimr-IN
Norwegiannb-NO
Polishpl-PL
Russianru-RU
Swedishsv-SE
Tamilta-IN
Telugute-IN
Turkishtr-TR
Ukrainianuk-UA
Urduur-IN
Vietnamesevi-VN

Using the language Parameter

Our speech synthesis endpoints (/v1/audio/speech and /v1/audio/stream) support the optional language parameter, which should follow the locale naming standard (e.g., en-US, fr-FR).

When to specify the language:

  • Known single language: If you know the input text is entirely in one language, providing the language parameter will result in better audio quality.
  • Unknown or mixed language: If you’re unsure of the input language or the text contains multiple languages, omit the language parameter. Speechify models will automatically detect and handle the language(s) in the input.

Voice Cloning Languages

All three Simba 3 models support voice cloning on paid plans. A cloned voice can synthesize in the selected model’s supported languages: the 48 above on Simba 3.5, English on Simba 3.2, or the six above on Simba 3.0. Check voice and model compatibility before sending a request. See Voice Cloning for sample requirements and implementation details.