9. The method of claim 1 , wherein the recorded reference speech utterances of the reference speaker are in a reference language and the colloquial speech utterances of all the respective colloquial speakers are all in a colloquial language, and wherein the colloquial language is lexically related to the reference language.
9. The method of claim 1 , wherein the recorded reference speech utterances of the reference speaker are in a reference language and the colloquial speech utterances of all the respective colloquial speakers are all in a colloquial language, and wherein the colloquial language is lexically related to the reference language. 11. The method of claim 9 , wherein training the TTS system using the provided aggregate set of conditioned speaker vectors comprises training the TTS system to synthesize speech in the colloquial language and in a voice of the reference speaker.