Publisher 3.1 brought the ability to import categories. To perform an import, first you must export existing categories to create a properly formatted file for importing. The file will include a primary key column, default language column containing current category field values, and columns for each additional language. Once your translations are added to your .csv export file, use the same file to import your translations. You can not add new categories with your import file. Publisher will only import translations for existing categories.