Speak developers page
Speak is a talking face for the XO laptop. Anything you type will be spoken aloud using the XO's speech synthesizer, espeak. You can adjust the accent, rate and pitch of the voice as well as the shape of the eyes and mouth. This is a great way to experiment with the speech synthesizer, learn to type or just have fun making a funny face for your XO.
Speak has also SpeakWithAlice
Is a modified version of Speak.Activity that embeds PyAIML and a chatterbot. It currently supports english and spanish but its simple to add new languages.
By changing the voice's language, you also change the chatterbot's brain.