8. The system of claim 1 , wherein the inverted index of advertising phrases includes a branch for each distinct combination of first word and accompanying linguistic locale identifier.
8. The system of claim 1 , wherein the inverted index of advertising phrases includes a branch for each distinct combination of first word and accompanying linguistic locale identifier. 9. The system of claim 8 , wherein a next word of each advertiser phrase is represented by a leaf node attached to an appropriate branch.