From a reply on March 30:

“ we’re also working on adding an option to give specific instructions to the agent, so you’ll be able to force a specific language if needed.”

Is this feature already available? If not, what is the ETA?

I work in a market in which most prospects would set their LN profile in English, but Spanish is their preferred language for their day-to-day interactions.

Reading the previous answers it is clear that while the agent could successfully engage in conversations in Spanish, for a cold outreach it will default to the language used in the profile - English in my case.

This would likely affect conversion rates of the AI agent. Thus, the importance of being able to manually set the language by campaign (and also by contact and by territory).