A ventriloquist’s voice comes from another mouth. Dream books read it as words spoken through someone else, or as feeling that your own voice is being borrowed or controlled.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.