WooCommerce Multilingual allows you to display product content in the default language when viewing the page in other languages. If a translation exists WooCommerce Multilingual displays it, otherwise, it displays product contents from the default language.
If your WooCommerce store features a large number of products and multiple languages, it might not be practical for you to translate them all. This is why WooCommerce Multilingual offers a translation mode which allows untranslated product content to appear in any target language. Other site content, such as the header, menu, and footer still appear in the selected target language.
Using this translation mode will have no negative SEO implications for your site.
WPML tells Google what the default product and category is, so Google can ignore all these duplicates. If you then actually translate a product or a category, Google will then see it as new content and not a duplicate.
If you are installing WooCommerce Multilingual in a new site, the setup wizard will offer you to enable this translation mode.
If you want to activate this translation mode for an existing site, go to the WPML → Settings page. Here, scroll down to the Post Types Translation section and select the Translatable – use translation if available or fallback to default language option for Products.
As you can see from the image above, you can also customize the products slug in other languages, if needed.
Besides products themselves, you can also display untranslated product categories, tags, and attributes. To do this, go to the WPML → Settings page. Here, scroll down to the Taxonomies Translation section and select the Translatable – use translation if available or fallback to default language option.
If there is a lock icon next to any of the taxonomies you want to modify, simply click on the lock icon to enable the translation option for that taxonomy.