Problem: The client is trying to link translations of posts created via the WPML REST API so that they are associated with each other, similar to how they are linked within the WordPress admin panel. The client can create posts in different languages by specifying the language code in the endpoint URL, but the posts are not linked as translations.
Solution: We recommend following the instructions provided in our documentation on using the WordPress REST API with WooCommerce Multilingual, which can be found here: Using WordPress REST API with WooCommerce Multilingual. Although this guide is for WooCommerce products, the process for regular posts is currently not implemented or possible. If this solution is not applicable or if the problem persists, we suggest opening a new support ticket for further assistance. Additionally, 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If the provided solution does not resolve your issue or if it seems outdated or irrelevant to your case, please do not hesitate to open a new support ticket with us. You can do so here: WPML support forum.
