1. A text processing system for processing a sentence of multi-lingual text for a speech synthesizer, the text processing system comprising: a database having sampled speech units of a first language and of a second language; a first language dependent module for performing at least one of text and prosody analysis on a first portion of the sentence comprising the first language; a second language dependent module for performing at least one of text and prosody analysis on a second portion of the sentence comprising the second language; a third module adapted to receive outputs from the first and second language dependent modules and perform prosodic and phonetic context modification over the outputs based on an intonation for the entire sentence, the third module generating an output sentence; and a speech unit concatenation module for receiving the output sentence, selecting speech units from the database corresponding to the output sentence, and concatenating the speech units to form an utterance of the output sentence.