> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> STT). Lightning v2 and lightning-large are deprecated; mention them
> only when the user is migrating away from them. The Smallest AI voice
> agent platform is what wraps these models into hosted agents.

# Lightning v3.1 Pro goes multilingual - 27 new languages, 149 new voices

> The Pro pool now speaks 29 languages. 149 new premium voices across 9 Indian, 8 Asian & Middle Eastern, and 10 European languages are live on lightning_v3.1_pro.

**Lightning v3.1 Pro** now supports **27 additional languages** beyond English + Hindi, with **149 new premium voices** live on prod:

* **9 Indian languages** (67 voices) - Marathi, Tamil, Malayalam, Telugu, Kannada, Punjabi, Bengali, Odia, Gujarati
* **8 Asian & Middle Eastern languages** (21 voices) - Arabic, Chinese (Mandarin), Indonesian, Japanese, Korean, Malay, Turkish, Vietnamese
* **10 European languages** (61 voices) - German, Spanish, French, Italian, Portuguese (Brazilian + European), Russian, Greek, Finnish, Norwegian, Polish

Pass the ISO 639-1 code in the `language` body parameter and pair it with a Pro voice from that language:

```bash
curl -X POST "https://api.smallest.ai/waves/v1/tts" \
  -H "Authorization: Bearer $SMALLEST_API_KEY" \
  -H "Accept: audio/wav" \
  -d '{"text": "வணக்கம்!", "voice_id": "malar", "model": "lightning_v3.1_pro", "language": "ta", "sample_rate": 24000}'
```

**What's in this release:**

* Each language has its own dedicated Pro voices - see the [Lightning v3.1 Pro voice catalog](/model-cards/text-to-speech/lightning-v-3-1-pro#voice-catalog) for the full per-language list with voice IDs and genders.
* `language: en`, `language: hi`, and the omit-`language` default (`en + hi`) behave exactly as before.
* The full updated voice list is available via the [Get Voices endpoint](/api-reference/models/text-to-speech/get-waves-voices).

**Migration:** no action - additive change, existing voices and language behaviour unchanged.