In Tutorial #1, you built a functioning AI voice agent from scratch. In this follow-up tutorial, you’ll learn how to add support for multiple languages—and allow users to switch between them with DTMF input via Voice channels.

Let’s make your agent more accessible and globally ready, with just a few steps.

• Configure your agent’s languages and voices: 00:14

• Add your language group to your AI agent: 02:24

• Update your agent’s greeting message: 02:38

• Test out the new language: 03:18

• Speak with your new multilingual AI agent: 03:40

Step 1 – Configure Your Agent’s Languages and Voices

To support multiple languages and voices, you’ll start by creating a Language Group. 00:14

• Log into the Syllable Console.

• Click the Languages tab, then select New Language Group.

• Name your group (e.g., Car Loan Demo Voices).

• Add languages—Syllable supports English, Spanish, Portuguese, French, Cantonese, Mandarin, Korean, Vietnamese, and Russian.

• Assign voice providers and sample different voices (OpenAI, Google, or ElevenLabs).

• Set up DTMF inputs (e.g., press 1 for English, 2 for Spanish).

• Optionally skip reading the default language prompt.

• Click Save.

💡 Tip: Review the list of supported languages and voice providers.

Step 2 – Assign the Language Group to Your Agent

Now, let’s connect your new language configuration to your agent. 02:24

• Go to the Agents tab.

• Click Edit on your agent.

• In the Language Group dropdown, select the group you just created.

• Add a label for clarity if needed.

• Click Save.

Step 3 – Add a Multilingual Prompt to Your Agent’s Welcome Message

Let’s now inform your users that they can interact in their language of choice by updating your Message. 02:38

• Open the Messages tab.

• Click Edit on your welcome message.

• Indicate the point in your message when you’d like your agent to offer additional languages.

• Use the Language Toggle Tool to control voice/language switches mid-message.

• Click Save.

Your AI agent can switch seamlessly between languages—without repeating the full prompt in every language.

💡 Tip: Learn more about Messages.

Step 4 – Preview Your Multilingual Agent (Web)

Time to make sure everything works just as planned. 03:18

• From your agent’s overview screen, click Start Session.

• Verify your agent greets in the default language.

• Press the DTMF key for another language (e.g., 2 for Spanish).

• Confirm that the agent continues the conversation in the selected language.

Step 5 – Speak With Your New Multilingual AI Agent (Voice)

Finally, let’s add a phone-number so you can speak with your new multilingual agent. 03:40

• Go to the Channels tab.

• Click New Channel and add a Channel Name and Target Number.

• Choose your agent from the dropdown.

• Add a Fallback Number for coverage.

• Click Save.

• Now dial the number and test the interaction by pressing a language option on your phone. Your agent will respond in the selected language—fully functional, in real time.

💡 Tip: Learn more about Channels (eg. Voice, Web) supported by Syllable Agentic Platform.

Your AI Agent is Now Multi-lingual.

With just a few steps, your agent can now:

• Greet users in multiple languages

• Respond using natural-sounding voices from trusted providers

• Switch languages based on DTMF input

• Support global customers with multi-lingual voice and text

💡 Everything you built today works in real time and scales automatically. No manual scripting. No hardcoding. All from the Syllable Console.

Want to go further?

Dive deeper into the platform with our Syllable Docs →

Ready to Try It?

👉 Start building multilingual AI agents today and give your agent the power of language.

No code required. Fully customizable. Built to scale.