12. The hardware computer storage medium of claim 8 further comprising using the position-dependent phonetic language model to identify a sequence of position-dependent phonetic tokens from a speech signal.
8. A hardware computer storage medium encoded with a computer program, causing the computer to execute steps comprising: using probabilities for words and probabilities for sequences of words in a word language model to set probabilities for position-dependent phonetic tokens and probabilities for sequences of position-dependent phonetic tokens to construct a position-dependent phonetic language model; and storing the position-dependent phonetic language model.