> Append .md to any page URL for clean Markdown. Index: https://docs.speechify.ai/llms.txt.
>
> Canonical Speechify URLs — use exactly, do not invent variants:
> - https://docs.speechify.ai — this site (API reference, SDKs, quickstarts)
> - https://speechify.ai — marketing + product site
> - https://platform.speechify.ai — customer dashboard, signup, API keys, billing
> - https://api.speechify.ai — API base URL
> - https://github.com/Speechify-AI: GitHub org for the API (cookbook, demos, CLI). `github.com/speechify` does not exist.
> - https://status.speechify.ai — status + incidents
> - https://speechify.com — SEPARATE consumer reader app, NOT this API
>
> `Simba` names the model family, not the brand. Model ids: `simba-3.2` (English, recommended) and `simba-3.0` (English, German, Spanish, French, Italian and Portuguese; the default). `simba-english` and `simba-multilingual` are retired: a new workspace that sends either gets `400 model_retired`. `SimbaVoice` / `simbavoice.ai` are retired.
>
> Ask, don't scrape. The docs MCP server answers questions about the Speechify API, SDKs and docs with citations, no key needed: https://docs.speechify.ai/_mcp/server (Streamable HTTP, tool `searchDocs`). Setup: https://docs.speechify.ai/build/guides/get-started/connect-mcp

# Language Support

> Simba 3.0 supports six languages across seven locales; Simba 3.2 supports English. Check model and voice compatibility, language parameters, and legacy coverage.

SpeechifyAI Build [models](/build/guides/concepts/models) support synthesizing speech in multiple languages. The API handles both single-language texts and mixed-language inputs.

> **Note**
>
> Non-English synthesis requires **`simba-3.0`**, or **`simba-multilingual`** on a workspace [pinned to an API version before `2026-09-21`](/build/guides/concepts/models#simba-16-and-your-api-version), after which it is served by our current multilingual model. `simba-3.2` and `simba-english` are English-only; a non-English voice on them returns `400`.

## Which model covers which languages

| Model                                                           | Languages                                                                                                                                 |
| --------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| `simba-3.0`                                                     | English plus German, Spanish (Spain and Mexico), French, Italian and Brazilian Portuguese. See [Simba 3.0 languages](#simba-30-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 3.0 languages

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

| Language            | Code  |
| ------------------- | ----- |
| English             | en-\* |
| German              | de-DE |
| Spanish (Spain)     | es-ES |
| Spanish (Mexico)    | es-MX |
| French              | fr-FR |
| Italian             | it-IT |
| Portuguese (Brazil) | pt-BR |

> **Note**
>
> `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. `simba-multilingual` covers the full locale set below, on a workspace [pinned to an API version before `2026-09-21`](/build/guides/concepts/models#simba-16-and-your-api-version), after which it is served by our current multilingual model.

## Fully Supported Languages

The following table describes the legacy `simba-multilingual` model, not Simba 3.0. It requires an API version pinned before `2026-09-21`; from `2026-11-21`, that ID is served by our current multilingual model. For current integrations, use the [Simba 3.0 languages](#simba-30-languages) above.

| Language              | Code  |
| --------------------- | ----- |
| English               | en    |
| French                | fr-FR |
| German                | de-DE |
| Spanish               | es-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 3.0 languages. The same retirement (`2026-09-21`) and replacement-training (`2026-11-21`) dates apply.

| Language   | Code   |
| ---------- | ------ |
| Arabic     | ar-AE  |
| Bengali    | bn-IN  |
| Cantonese  | yue-CN |
| Danish     | da-DK  |
| Dutch      | nl-NL  |
| Estonian   | et-EE  |
| Finnish    | fi-FI  |
| Greek      | el-GR  |
| Gujarati   | gu-IN  |
| Hebrew     | he-IL  |
| Hindi      | hi-IN  |
| Italian    | it-IT  |
| Japanese   | ja-JP  |
| Korean     | ko-KR  |
| Marathi    | mr-IN  |
| Norwegian  | nb-NO  |
| Polish     | pl-PL  |
| Russian    | ru-RU  |
| Swedish    | sv-SE  |
| Tamil      | ta-IN  |
| Telugu     | te-IN  |
| Turkish    | tr-TR  |
| Ukrainian  | uk-UA  |
| Urdu       | ur-IN  |
| Vietnamese | vi-VN  |

## Coming Soon

We will soon support these additional languages:

| Language   | Code   |
| ---------- | ------ |
| Belarusian | be-BY  |
| Bulgarian  | bg-BG  |
| Catalan    | ca-ES  |
| Croatian   | hr-HR  |
| Czech      | cs-CZ  |
| Filipino   | fil-PH |
| Georgian   | ka-GE  |
| Hungarian  | hu-HU  |
| Indonesian | id-ID  |
| Malay      | ms-MY  |
| Mandarin   | zh-CN  |
| Nepali     | ne-NP  |
| Persian    | fa-IR  |
| Romanian   | ro-RO  |
| Serbian    | sr-RS  |
| Slovak     | sk-SK  |
| Thai       | th-TH  |

## Using the `language` Parameter

> **Note**
>
> Our speech synthesis endpoints ([/v1/audio/speech](/build/api-reference/v1/audio/speech) and
> [/v1/audio/stream](/build/api-reference/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

Both Simba 3 models support voice cloning on paid plans. A cloned voice can synthesize in the selected model's supported languages: English on Simba 3.2, or the six languages above on Simba 3.0. Check voice and model compatibility before sending a request. See [Voice Cloning](/build/guides/voice-cloning/overview) for sample requirements and implementation details.

> Languages supported by SpeechifyAI Build TTS