### Answer Based on the available sources, I don't see a specific field in the webhook payload that directly indicates which language the agent switched to during a call. The webhook payload includes the call object with fields like

transcript

,

transcript_object

, and

transcript_with_tool_calls

, but there's no explicit language field documented in the webhook response structure. [(1) ]() Potential workarounds: 1. **Post-call analysis**: You could configure custom post-call analysis to extract the detected language from the transcript. 2. **Custom function call**: You could have your agent call a custom function when it detects a language switch, passing the language as a parameter to your backend. 3. **Transcript analysis**: Parse the

transcript

or

transcript_object

from the

call_ended

or

call_analyzed

webhook to detect language patterns. If you need this as a native feature, I'd recommend reaching out to Retell support or checking their latest API documentation for any recent additions. Check out these potentially useful sources: - [Webhook Overview]() - [Dynamic Variables]() Would you like me to try providing a general answer on how you might implement language detection through custom functions?

​ To learn more, see the sources I considered: [[1] Webhook Overview](https://docs.retellai.com/features/webhook-overview) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.

### Answer Based on the available sources, I don't have specific documentation about whether a language switch event is registered when a multilingual agent changes languages during a call. The changelog documentation I have access to covers API changes, SDK updates, and features like function calling and transcription, but doesn't detail multilingual agent behavior or language-switch event logging. [(1) ]() Suggested next steps: Check out these potentially useful sources: - [Documentation]() - [Hire certified Retell partner]() Would you like me to try providing a general answer based on my broader knowledge of how such events might typically be handled?

​ To learn more, see the sources I considered: [[1] Platform Changelogs | Retell AI](https://www.retellai.com/changelog) ​

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.