Multilingual Voice & Text Telegram Bot with ElevenLabs TTS and LangChain Agents

This workflow contains community nodes that are only compatible with the self-hosted version of n8n.

Telegram Voice AI Assistant This n8n template creates a multimodal Telegram bot that dynamically responds to users:

Replies with voice** when receiving voice messages (using ElevenLabs TTS)

Replies with text** for text-based queries

Supports custom AI tools (e.g., crypto APIs, databases, or custom functions)

Built with LangChain Agents, it can integrate any external API or data source into conversations.

Key Features 🎙️ Smart Response Logic Voice Query? → Voice Reply** Transcribes audio via ElevenLabs STT Processes with AI (Groq/Gemini) Converts text response to natural speech (ElevenLabs TTS)

Text Query? → Text Reply** Bypasses TTS/STT for faster responses

🛠️ Extensible AI Tools Add your own tools: Database lookups Weather/stock APIs Custom Python functions RAG (document retrieval)

Supports multi-step tool chaining (e.g., "Get BTC price → analyze trends → summarize")

🌐 Language & Context Auto-detects user language (via Telegram’s language_code) Maintains session memory (remembers conversation history)

Use Cases Voice-first customer support** Crypto/analytics assistants** (e.g., "What’s Ethereum’s current gas fee?") Multilingual FAQ bots** Educational tutors** (voice-interactive learning)

Requirements Telegram Bot Token** ElevenLabs API Key** (For TTS/STT) Groq API Key* or Google Gemini API Key*

Customization Tips Change AI personality*: Modify the systemMessage in the Voice Assistant node Add more models*: Swap Groq/Gemini for OpenAI, Anthropic, etc. Extend functionality**: Add RAG (Retrieval-Augmented Generation) for document queries

Take this template to create a Siri-like AI assistant for Telegram in minutes! 🚀