Yes, Webkul Magento Multi-Vendor Marketplace supports Multi-sites & Multi-stores. By default, Magento provides a single language and single currency support.
For the multi-store, the admin will create multiple store views for multiple languages in the back-end. For the English, the admin will create a store view and for the French language, the admin will create another store view.
Now, these store views are reflected on the vendor’s side for the product upload.
For the multi-sites, the admin can create separate store views for each language in the back-end and the URLs for all the multi-sites will be the same.
Please do contact us for any further queries or requirements.