6. The system of claim 5 , wherein the semi-supervised lexicon adaptation includes: determining a plurality of possible pronunciations for the word; performing speech recognition on each of the plurality of possible pronunciations; and selecting one of the plurality of possible pronunciations that best represents an audio recording of the word as spoken by an accented speaker.
5. The system of claim 1 , further comprising a lexicon adaptation component that is executed by the one or more processors and that generates the accented speech data for the word using semi-supervised lexicon adaptation.