9. 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, on the system, text from a user for conversion to speech via a text-to-speech process; identifying a primary speech segment in a primary speech database which does not meet a need of the text-to-speech process; identifying a replacement speech segment which satisfies the need in a secondary speech database; and adding replacement speech segment to the primary database such that the primary database meets the need of the text-to-speech process.
13. The system of claim 9 , wherein the need is based on one of dialect differences, geographic language differences, regional language differences, accent differences, national language differences, idiosyncratic speech differences, and database coverage differences.