Hinglish Speech To Text: Build Voice AI for Indian Calls

Bolti, a voice AI platform for phone agents, lets you build production-ready conversational voice bots with native support for Hinglish speech to text. Whether you are running outbound sales, support desks, or payment reminders, Bolti helps you handle mixed-language conversations at just ₹6/min with a free trial of 50 minutes.

In India, people rarely speak pure English or pure Hindi on a phone call. They mix both languages naturally. If your voice AI agent cannot handle this hybrid phrasing, your customer experience will drop. Bolti solves this by processing mixed-language speech with sub-second turn-taking and telephony-grade noise cancellation.

What is Hinglish speech to text?

Hinglish speech to text is the technology that transcribes spoken sentences containing a mix of Hindi and English words into written text. Instead of failing when a user says "Mera order status check karo" or "Payment fail ho gaya hai", a Hinglish-capable speech-to-text (STT) engine accurately captures both the Hindi verbs and the English nouns in a single stream.

For businesses deploying voice bots in India, this capability is not optional. Standard English STT engines fail on Hindi words, and pure Hindi STT engines fail on English technical terms like "reboot", "refund", or "OTP".

Why Hinglish matters for phone calls in 2026

• Natural Conversations: Callers do not want to speak like a textbook. They want to use their everyday conversational language.
• Lower Drop-offs: Accurate transcription prevents the voice AI from asking "Can you repeat that?" multiple times.
• Better Tool Triggers: Accurate text means your Large Language Model (LLM) can reliably extract variables like order IDs or dates to call external APIs.

How Bolti handles Hinglish speech to text

Bolti handles Hinglish conversations by pairing high-accuracy, multilingual speech-to-text models with optimized LLM prompts. Because Bolti is built for production phone calls, the translation and transcription happen in real time with sub-second latency.

When a caller speaks Hinglish, Bolti's system performs the following steps:

1. Audio Capture: The system captures live audio from the phone line, filtering out background noise using telephony-grade noise cancellation.
2. Hinglish Transcription: The speech-to-text engine processes the audio stream, outputting a transcript that preserves both the English and Hindi words.
3. Contextual LLM Processing: The transcript is passed to the LLM. You can configure your agent's system prompt to instruct it to understand Hinglish and reply in the same natural tone.
4. Action Execution: If the user asks for an action, the LLM can trigger a workspace HTTP tool (like looking up an order) based on the transcribed intent.

Setting up a Hinglish voice agent in Bolti

Creating a voice agent that understands Hinglish takes less than 10 minutes. You do not need complex programming to get started.

Step 1: Create your agent

Log in to the Bolti dashboard and create a new agent. You can select your preferred LLM and voice. Bolti supports over 80 global and Indian regional languages (including Hindi, Marathi, Tamil, Telugu, Bengali, and Gujarati).

Step 2: Configure the system prompt

To make your agent converse naturally in Hinglish, write a system prompt that encourages mixed-language understanding. For example:

"You are a helpful customer support assistant for an e-commerce company in India. You understand Hinglish perfectly. If the customer speaks to you in a mix of Hindi and English, reply in a warm, professional, and natural Hinglish tone (e.g., 'Sure, main aapka order status check kar deta hoon')."

Step 3: Connect your business tools

A voice agent is most useful when it can take actions. Use the Tools tab in the Bolti dashboard to give your agent capabilities like checking order statuses, booking appointments, or processing refunds.

As explained in our tool calling introduction, when a caller says "Mera order track kar do", the LLM understands the Hinglish intent, extracts the variables, and triggers your API instantly.

Why businesses choose Bolti for Indian voice AI

Indian enterprises and SMBs compare Bolti against platforms like Bolna AI and Ringg AI. Bolti stands out because of its developer-first architecture and deep telephony integrations.

• Bring Your Own Carrier (BYOC): Connect your existing SIP trunks from providers like Exotel, Plivo, or Twilio, or use Bolti's pre-configured numbers.
• Open API & MCP Server: Every action in the dashboard can be done via our REST API. Developers can also use the native Bolti MCP server to manage agents, tools, and call logs directly from editors like Cursor or Claude Desktop.
• Enterprise Security: Bolti offers on-premises deployment options, sub-accounts for white-labeling, runtime PII redaction, and compliance with DPDP, GDPR, and HIPAA frameworks.

If you want to see how these integrations work in real business scenarios, explore our Bolti use cases.

Try Bolti for Hinglish voice agents

Ready to build a voice assistant that speaks the language of your customers? You can set up and test your first Hinglish-speaking voice agent in under 10 minutes.

Sign up for a free account today to get 50 free minutes of call time. Once you are ready to scale, our pay-as-you-go pricing starts at just ₹6/minute with no hidden fees.

Start your free trial on the Bolti platform and build your first agent today. For custom enterprise requirements or high-volume discounts, you can also view our Bolti pricing page.

Frequently Asked Questions

Does Bolti support other Indian regional languages?

Yes. Beyond Hinglish and English, Bolti supports Hindi, Marathi, Tamil, Telugu, Bengali, Gujarati, and over 80 other global languages.

Can the voice agent reply in Hinglish as well as understand it?

Yes. By configuring your agent's system prompt to reply in Hinglish and selecting an appropriate voice, the agent will speak back to the customer using a natural mix of Hindi and English.

How much does it cost to run a voice agent on Bolti?

Bolti uses a transparent pay-as-you-go pricing model that starts at ₹6/minute. There are no setup fees, and new signups receive 50 free minutes to test the platform.

Can I connect my own Indian phone numbers to Bolti?

Yes. Bolti supports Bring Your Own Carrier (BYOC). You can connect your existing SIP trunks from Indian providers like Exotel, or global providers like Twilio and Plivo, directly to your Bolti agents.