> ## Documentation Index > Fetch the complete documentation index at: https://www.bolna.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # Indian language voice agents on Bolna > Build a voice agent in Hindi, Bengali, Tamil, Telugu, Marathi, Gujarati, Kannada, Malayalam, Punjabi, Odia or Urdu, with the transcribers and voices for each. Bolna voice agents run in 20+ languages. This section has a guide for each Indian language below: which transcribers (speech-to-text) and voices (text-to-speech) support it, the language code to send, how to start calls in it, and a minimal create-agent API example. Each language needs a transcriber and a voice that both support it. The providers listed here are the ones whose own pages in these docs confirm the language. A provider not listed may still work, but place a test call first. *** ## Language guides > [card] [Hindi](https://www.bolna.ai/docs/customizations/hindi-voice-agent.md) > > Hindi and Hinglish agents, code `hi` > [card] [Bengali](https://www.bolna.ai/docs/customizations/languages/bengali.md) > > Bengali agents, code `bn` > [card] [Tamil](https://www.bolna.ai/docs/customizations/languages/tamil.md) > > Tamil agents, code `ta` > [card] [Telugu](https://www.bolna.ai/docs/customizations/languages/telugu.md) > > Telugu agents, code `te` > [card] [Marathi](https://www.bolna.ai/docs/customizations/languages/marathi.md) > > Marathi agents, code `mr` > [card] [Gujarati](https://www.bolna.ai/docs/customizations/languages/gujarati.md) > > Gujarati agents, code `gu` > [card] [Kannada](https://www.bolna.ai/docs/customizations/languages/kannada.md) > > Kannada agents, code `kn` > [card] [Malayalam](https://www.bolna.ai/docs/customizations/languages/malayalam.md) > > Malayalam agents, code `ml` > [card] [Punjabi](https://www.bolna.ai/docs/customizations/languages/punjabi.md) > > Punjabi agents, code `pa` > [card] [Odia](https://www.bolna.ai/docs/customizations/languages/odia.md) > > Odia agents, code `od` > [card] [Urdu](https://www.bolna.ai/docs/customizations/languages/urdu.md) > > Urdu agents, code `ur` *** ## Providers by language | Language | Code | Transcribers (speech-to-text) | Voices (text-to-speech) | Auto-detect | | - | - | - | - | - | | [Hindi](https://www.bolna.ai/docs/customizations/hindi-voice-agent.md) | `hi` | Sarvam, Soniox, Gemini, AssemblyAI, Deepgram `nova-2`, Smallest AI, OpenAI, Gladia | Sarvam, Maya, Soniox, Kalpa Labs, Cartesia, ElevenLabs | Yes | | [Bengali](https://www.bolna.ai/docs/customizations/languages/bengali.md) | `bn` | Sarvam, Soniox, Gemini | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Tamil](https://www.bolna.ai/docs/customizations/languages/tamil.md) | `ta` | Sarvam, Soniox, Gemini, Smallest AI | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Telugu](https://www.bolna.ai/docs/customizations/languages/telugu.md) | `te` | Sarvam, Soniox, Gemini, Smallest AI | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Marathi](https://www.bolna.ai/docs/customizations/languages/marathi.md) | `mr` | Sarvam, Soniox, Gemini, AssemblyAI | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Gujarati](https://www.bolna.ai/docs/customizations/languages/gujarati.md) | `gu` | Sarvam, Soniox, Gemini | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Kannada](https://www.bolna.ai/docs/customizations/languages/kannada.md) | `kn` | Sarvam, Soniox, Gemini, Smallest AI | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Malayalam](https://www.bolna.ai/docs/customizations/languages/malayalam.md) | `ml` | Sarvam, Soniox, Gemini, Smallest AI | Sarvam (`bulbul:v3`), Maya, Soniox, ElevenLabs | Yes | | [Punjabi](https://www.bolna.ai/docs/customizations/languages/punjabi.md) | `pa` | Sarvam, Soniox | Sarvam, Maya, Soniox, ElevenLabs | Yes | | [Odia](https://www.bolna.ai/docs/customizations/languages/odia.md) | `od` | Sarvam | Sarvam (`bulbul:v3`), Maya | No | | [Urdu](https://www.bolna.ai/docs/customizations/languages/urdu.md) | `ur` | AssemblyAI | Soniox | Yes | "Auto-detect" means Bolna can [detect the language automatically](https://www.bolna.ai/docs/customizations/supported-languages#languages-with-automatic-detection) mid-call on a multilingual agent. For the provider notes behind this table, including ElevenLabs model coverage and Assamese, see [Indian languages by provider](https://www.bolna.ai/docs/customizations/multilingual-languages-support#indian-languages-by-provider). *** ## What every language guide covers * **Language code.** Send the plain code, such as `ta`, as `transcriber.language` and in `provider_config.language`, not a locale such as `ta-IN`. Odia is `od` everywhere except Maya, which takes `or`. * **Starting a call in a language.** On a multilingual agent, pass `"agent_data": { "language": "" }` on `POST /call`, or an `agent_language` column in a batch CSV. See [Start a call in a chosen language](https://www.bolna.ai/docs/customizations/start-call-in-language.md). * **Switching mid-call.** See [How language switching works](https://www.bolna.ai/docs/customizations/language-switching-behavior.md) and [Auto-switch languages](https://www.bolna.ai/docs/customizations/auto-switch-multilingual-messages.md) for system messages. * **Prompts.** Write each language's prompt in its native script. See [Writing prompts in non-English languages](https://www.bolna.ai/docs/writing-prompts-in-non-english-languages.md). * **Recognition.** Bias the transcriber toward names and terms with [keywords and context](https://www.bolna.ai/docs/customizations/asr-keywords-and-context.md). For every language and code you can add to an agent, including non-Indian languages, see [Supported languages](https://www.bolna.ai/docs/customizations/supported-languages). *** ## Next steps > [card] [Multilingual setup](https://www.bolna.ai/docs/customizations/multilingual-languages-support) > > Add several languages to one agent, each with its own voice and prompt > [card] [Multilingual agent quickstart](https://www.bolna.ai/docs/quickstarts/multilingual.md) > > Build an English and Hindi agent over the API This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.