31. The navigation device of claim 30 , wherein the conversational language processor is further configured to: divide the geographic chunks into multiple tiles, wherein the dynamic recognition grammar further organizes the grammar information according to the multiple tiles associated with the divided geographic chunks; and divide one or more of the multiple tiles into multiple subtiles, wherein the dynamic recognition grammar further organizes the grammar information according to the multiple subtiles associated with the divided one or more of the multiple tiles.
30. The navigation device of claim 23 , wherein the dynamic recognition grammar organizes the grammar information according to geographic chunks based on the one or more topological domains associated with the current location associated with the navigation device.