1. A method comprising: collecting a customer specific services list associated with a customer about to use an interactive voice response system; for each service in the customer specific services list, generating country-specific weights; generating a set of summary weights for a plurality of countries based on an aggregation of the country-specific weights; selecting an interactive voice response system language model based on the set of summary weights; and recognizing speech received from the customer via the interactive voice response system based on the interactive voice response system language model.