2. My agent's default language is English. I have prompted her to switch and speak other European languages. Each time I switch language it seems to bug and hang up the call after 5sec -> is this a common issue?

1. For CSV uploads in Vapi AI, ensure phone numbers are in international format, without spaces or special characters, and the column is correctly labeled like “Phone Number” 2. Language switching bugs and call drops can happen if the model doesn’t fully support that language or if timeout settings are too low, check your silenceTimeoutSeconds and model compatibility.