Need help with finding something for my movie?

Hey, i'm going to make a movie with imovie, but I want to make it like someones telling a story and we're in it. Adults usually don't participate in our movies, so is their any translate software on the web like google translate (except with a mans voice), or any software on the web which will repeat what you type in (mans voice)? If their is please inform me, and make sure its on the web. And I don't want any cracked website, maybe an official one? thanks! :)