When I check to see which categories still need translation, the pages says "No Product categories found.", but the status tab says "Taxonomies Missing Translations: 328 Product categories are missing translations".
So, I can't seem to find those 328 Product categories that are missing translations.
Solution:
1- Go to WPML-> Settings-> Custom Term Meta Translation section
2- Set the "order" meta to "Copy" and save
3- Go to Products-> Categories in the default language
4- Update the parent categories
