Will Macowski

Problem:
The client is attempting to convert posts into custom post types (CPT) based on their categories, ensuring that translations remain attached and old permalinks redirect to the new ones. They encountered issues where not all translations transferred during the migration using WPCLI.
Solution:
We recommend disabling the WPML plugin initially to ensure all posts are correctly converted to the new CPT without language complications. Once this is done, re-enable WPML and manually connect the posts as translations. This can be done either through the WPML interface or programmatically using the

wpml_set_element_language_details

hook. Detailed guidance on linking translations can be found here: https://wpml.org/faq/how-to-link-already-translated-pages/
and the hook documentation here: https://wpml.org/wpml-hook/wpml_set_element_language_details/
If custom coding is required, we suggest hiring a WPML contractor from https://wpml.org/contractors/

Please note that this solution might be outdated or not applicable to your specific case. 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. If the issue persists, please open a new support ticket for further assistance.