What languages does the Voice Agent API support?

AssemblyAI's Voice Agent API supports six languages—English, Spanish, French, German, Italian, and Portuguese—and facilitates native code-switching, allowing seamless transitions between languages within a single conversation using the Universal-3 Pro Streaming model. Priced at a flat $4.50 per hour, this API integrates speech-to-text, LLM, and text-to-speech processes through a single WebSocket with approximately one second of latency. A critical feature beyond language support is the inclusion of keyterms prompting, enabling the agent to accurately recognize and transcribe specific product names, customer names, and industry-specific jargon, enhancing the overall user experience. While the Voice Agent API covers these six languages, AssemblyAI's broader platform offers support for over 99 languages through Whisper-Streaming for real-time speech-to-text and Universal-2 for post-call transcription, with plans for future language expansion.

Use this post, company, and trend context to find content marketing opportunities, perform competitive analysis, or address product feature gaps via the Plushcap MCP server or the Plushcap API.