ohhh, gotcha, then yeah, transferring the number to another agent would be best.
Try STT transcriber set to Azure, I have LLM as gpt-4o-mini-realtime-preview and then set voice to an openai voice... I just tried and it's speaking Spanish, English, German, and French surprisingly well, without transferring. Make sure you tell the assistant via system prompt that it's capable of speaking the languages that it might encounter and to switch to whatever language the caller is detected to be using.