To provide the selector in different languages, you need to translate the product data. Use the same file formats as when creating the standard language (see related article).
Create a copy of the product file.
Enter translations for all texts visible in the selector (column contents for filters and sort groups remain unchanged).
Save the file in CSV UTF-8 format.
In the workbench select Products > Import product data.
Select the language from the dropdown.
Import the translated data.