Rosetta Stone, maker of the popular foreign language software, filed a federal trademark suit against Google in Virginia Friday, alleging that one of the Web giant’s major advertising programs allows companies to confuse consumers.

The suit, filed by Gibson, Dunn & Crutcher partner Terence Ross at the U.S. District Court for the Eastern District of Virginia, is just the latest to target Google for its AdWords program, which lets companies buy advertisements that run alongside its search engine results. The ads are triggered by certain keywords, and show up as “sponsored links.”