13. The computing system of claim 12 , wherein the operation of determining the revised output comprises: after selecting the action language model as the selected language model, providing the input speech and an action lattice to the action language model, and responsively receiving a revised action lattice from the action language model; and after selecting the query language model as the selected language model, providing the input speech and a query lattice to the query language model, and responsively receiving a revised query lattice from the query language model.
12. The computing system of claim 9 , wherein the classifier comprises a binary classifier configured to receive the outputs from both the action language model and the query language model and to select either the action language model or the query language model as the selected language model.