maybe I'm wrong, and I'm glad to be wrong! in the short guide of the plugin there is textually

"Categories are handled differently from other versions of EP. You can now import multilingual categories (Like Products Names, descriptions, etc.).
To achieve this, each v_categories_names_1, v_categories_names_2, etc. correspond to a language installed in your system, and individual category
names are separated by the Carat "^" symbol. For Example: Bar Supplies^Glass Washers^Brushes

"Bar Supplies" will be your Top level Category, with "Glass Washers" as a sub-directory, and "Brushes" as a sub-directory of "Glass Washers"."



in this case seems to support 3 levels of product categories.............