Problem: The client is experiencing issues with duplicate products and categories after deactivating WPML on a WooCommerce site. They expected to see the original number of products and categories but found more than anticipated. Solution: If you're experiencing similar issues after deactivating WPML, we recommend following our guide on how to properly remove WPML and its data from your site. This includes a step-by-step process on performing a WPML reset, which should help in resolving the duplication of products and categories. Please refer to our detailed documentation here: Deleting Languages and Plugin Data by Doing a WPML Reset.
If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. Should you need further assistance, please do not hesitate to open a new support ticket at WPML support forum.