Background of the issue:
I'm trying to implement a WooCommerce website with 3 languages. English is the main. I have about 500 products I need to import (so that makes 1500 in 3 languages). At this point I'm testing with a few products. I use standard WooCommerce import, so, there is just one csv file that includes products and categories.
Symptoms:
In general, import is working, but the product category is not assigned - instead, it creates duplicates. Also, it doesn't show existing translated categories.
Questions:
How can I prevent duplicate product categories during import?
Why are existing translated categories not showing up?
Are you importing the default language as well as the translations?
The translations will need to be connected to the default language, in order to do this, it's required to use WP All Import along with WPML All Import along with the WooCommerce add-on.