This thread is resolved. Here is a description of the problem and solution.
Problem:
The client is experiencing issues with templates not displaying content in a multilingual setup using Elementor and WPML.
Solution:
If you're facing similar issues, we recommend following these steps:
1. Ensure you have taken a full site backup.
2. Follow the documentation to register custom Elementor widgets for translation: https://wpml.org/documentation/support/multilingual-tools/registering-custom-elementor-widgets-for-translation/
3. Test the automatically generated XML code as outlined here: https://wpml.org/documentation/support/multilingual-tools/registering-custom-elementor-widgets-for-translation/#testing-the-automatically-generated-xml-code
4. Add the required language configuration in WPML >> Settings >> Custom XML Configuration.
5. Update the post/page in the original language by making a minor change to refresh the translation settings.
Please note that this solution might be outdated or not applicable to your specific case.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, do not hesitate to open a new support ticket for further assistance at WPML support forum.
This is the technical support forum for WPML - the multilingual WordPress plugin.
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This topic is split from https://wpml.org/forums/topic/the-advanced-translation-editor-does-not-load-all-page-content-and-every-arabic-language-url-return/