14. The system of claim 12 , wherein the query context includes a location of the user device and wherein the language model rules include a geographic language model rule having an adjustment factor for a particular word sequence located in a particular geographic region.
14. The system of claim 12 , wherein the query context includes a location of the user device and wherein the language model rules include a geographic language model rule having an adjustment factor for a particular word sequence located in a particular geographic region. 15. The system of claim 14 , wherein applying the one or more language model rules includes determining that the location of the user device matches the particular word sequence of the geographic language model rule.