20. The computer-implemented method of claim 16 , wherein generating the accented speech data for the word employs semi-supervised lexicon adaptation.
16. A computer-implemented method comprising: generating, by a server device, accented speech data for a word; generating, by the service device, a parse table for the word, the parse table including a plurality of levels with each level corresponding to a subword type and including one or more subwords of the subword type, the plurality of levels including a respective level for a phone type, a position-specific cluster (PSC) type, and a syllable type; for each respective level of the parse table, determining, by the server device and based on the accented speech data, a lattice of one or more possible mispronunciations for the one or more subwords at the respective level; and combining the determined lattices to generate a model for accented speech recognition, wherein the model includes a probability that each of one or more phone sequences will be generated by an accented speaker of the word.