5. The method of claim 4 , wherein determining the phrase-level token further comprises: determining, based on a plurality of features associated with the gesture, a group of alignment points traversed by the gesture; determining respective cost values for each of at least the first key, the second key, and a third key, wherein each of the respective cost values represents a probability that an alignment point of the group of alignment points indicates a key of the plurality of keys; determining a first combined cost value based at least in part on the determined cost value for the first key and the determined cost value for the second key; determining a second combined cost value based at least in part on the determined cost value for the first key and the determined cost value for the third key; comparing the first combined cost value and the second combined cost value; and determining the second word-level token based on the comparison of the first combined cost value and the second combined cost value.
5. The method of claim 4 , wherein determining the phrase-level token further comprises: determining, based on a plurality of features associated with the gesture, a group of alignment points traversed by the gesture; determining respective cost values for each of at least the first key, the second key, and a third key, wherein each of the respective cost values represents a probability that an alignment point of the group of alignment points indicates a key of the plurality of keys; determining a first combined cost value based at least in part on the determined cost value for the first key and the determined cost value for the second key; determining a second combined cost value based at least in part on the determined cost value for the first key and the determined cost value for the third key; comparing the first combined cost value and the second combined cost value; and determining the second word-level token based on the comparison of the first combined cost value and the second combined cost value. 6. The method of claim 5 , wherein the plurality of features associated with the gesture comprises at least one of: a length of a segment of the gesture, wherein the segment comprises a path traversed by the gesture at the presence-sensitive display; a direction of the segment of the gesture; a curvature of the segment of the gesture; a local speed that represents a rate at which the segment of the gesture was detected; and a global speed that represents a rate at which the gesture was detected.