To set up the Merchandising UI for Search Merchandising, you configure the language, segment, and site dimensions. For example, you set properties of the LanguageDimensionService that map locales to the language names used in the Merchandising UI.

When you set up your Commerce site, make sure its instances of the LanguageDimensionService, the SegmentDimensionService, and the SiteDimensionService have the same configuration as the instances of these services in the Merchandising environment. If you assemble both applications from the same ATG installation, this happens automatically.