10. A system comprising: a processor; and a computer-readable storage medium having instructions stored which, when executed by the processor, result in the processor performing operations comprising: receiving, from a sender, a textual message generated by a spoken dialog system; selecting, based on voice characteristics of the sender and the sender speaking a particular set of lines, a speech template from a plurality of speech templates, the speech template comprising information representing characteristics of an individual's voice, wherein each speech template in the plurality of speech templates is personalized to the individual and in a distinct language from other speech templates in the plurality of speech templates; accessing pre-recorded speech from storage corresponding to a first portion of the textual message; generating variable speech corresponding to a second portion of the textual message; and merging the pre-recorded speech and the variable speech in an order defined by the speech template.
18. The system of claim 10 , the computer-readable storage medium having additional instructions stored which, when executed by the processor, result in the processor performing operations comprising: receiving a voice sample from a user; and generating a user specific speech template for the user based on the voice sample.