20. The computer-readable storage device of claim 15 , wherein each identified word in the identified words is assigned a respective time stamp, and the computer-readable storage device having additional instructions stored which, when executed by the computing device, cause the computing device to perform operations comprising adding an identified word of the identified words to the modified dynamic language model based on the respective time stamp assigned to the identified word.
15. A computer-readable storage device having instructions stored which, when executed by a computing device, cause the computing device to perform operations comprising: identifying words in optically-recognized text that are relevant to a recorded utterance based on references within the optically-recognized text to external data, to yield identified words; adding the identified words to a dynamic language model to generate a modified dynamic language model; and recognizing the recorded utterance using the modified dynamic language model, wherein the modified dynamic language model comprises a speech recognition model.