2. The system of claim 1 , further comprising an error model that is accessible by the transducer and wherein the error model includes: available letter substitutions including an individual available letter substitution that matches a letter substitution misspelling of a third word in the speech recognition data, wherein the letter substitution misspelling substitutes a second letter for a first letter that is present in a corrected form of the third word, available letter deletions including an individual available letter deletion that matches a letter deletion misspelling of the third word in the speech recognition data, wherein the letter deletion misspelling is identical to the corrected form of the third word except for a single missing letter that is present in the corrected form of the third word and not the letter deletion misspelling, and available letter additions including an individual available letter addition that matches a letter addition misspelling of the third word in the speech recognition data, wherein the letter addition misspelling is identical to the corrected form of the third word except for a single additional letter that is present in the letter addition misspelling but not the corrected form of the third word.
2. The system of claim 1 , further comprising an error model that is accessible by the transducer and wherein the error model includes: available letter substitutions including an individual available letter substitution that matches a letter substitution misspelling of a third word in the speech recognition data, wherein the letter substitution misspelling substitutes a second letter for a first letter that is present in a corrected form of the third word, available letter deletions including an individual available letter deletion that matches a letter deletion misspelling of the third word in the speech recognition data, wherein the letter deletion misspelling is identical to the corrected form of the third word except for a single missing letter that is present in the corrected form of the third word and not the letter deletion misspelling, and available letter additions including an individual available letter addition that matches a letter addition misspelling of the third word in the speech recognition data, wherein the letter addition misspelling is identical to the corrected form of the third word except for a single additional letter that is present in the letter addition misspelling but not the corrected form of the third word. 3. The system of claim 2 , wherein: the error model is configured to assign a first cost to the individual available letter substitution, a second cost to the individual available letter deletion, and a third cost to the individual available letter addition; and the transducer is configured to apply spelling corrections to the speech recognition data based on the first cost, the second cost, and the third cost.