1. A computer-implemented method comprising: receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance; determining, by the computer-implemented agent, that the utterance specifies a request for another computer-implemented agent represented by data, stored on the user device, that identifies a particular style of expression for the other computer-implemented agent from among two or more different styles of expression for a particular language; receiving, by the user device, identification of a response to the utterance from the other computer-implemented agent; determining, by the user device, the particular style of expression for the other computer-implemented agent to use for presentation of the response; and presenting, by the user device, the response to the utterance received from the other computer-implemented agent according to the particular style of expression.
1. A computer-implemented method comprising: receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance; determining, by the computer-implemented agent, that the utterance specifies a request for another computer-implemented agent represented by data, stored on the user device, that identifies a particular style of expression for the other computer-implemented agent from among two or more different styles of expression for a particular language; receiving, by the user device, identification of a response to the utterance from the other computer-implemented agent; determining, by the user device, the particular style of expression for the other computer-implemented agent to use for presentation of the response; and presenting, by the user device, the response to the utterance received from the other computer-implemented agent according to the particular style of expression. 13. The method of claim 1 wherein the data, stored on the user device, that represents the other computer-implemented agent includes text-to-speech parameters for responses provided by the other computer-implemented agent.