The new conversations system (formerly Persona device) is now available as an Experimental feature. You can use conversations to create AI-powered characters with personalities and voices that can talk, react, and respond to player actions—and even drive gameplay.
As with any Experimental feature, you can try it out, provide feedback, and see what we’re planning—but you can’t yet publish projects using conversations. If you have any feedback or encounter issues, share your thoughts in the developer forums thread. Conversations Feedback Thread
Before you get started, note that we’ve updated the Fortnite Developer Rules to include new rules specific to conversations (rule 1.22). Review them before building. Fortnite Developer Rules - Epic Games
Read the full blog and explore documentation here: https://www.fortnite.com/news/bring-npcs-to-life-with-ai-powered-conversations