This thread is resolved. Here is a description of the problem and solution.
Problem:
You are experiencing issues with translating new page elements on your website using WPML. Despite deleting and creating a new translation, the new elements do not appear, and the old layout remains.
Solution:
1. In ACF > Field Groups, delete all the groups you created in secondary languages and keep only the original one in your primary language.
2. In WPML > Settings > Post types translation, set Field Groups (acf-field-group) to "Don't translate".
3. Install the ACF Multilingual add-on using the banner at the top of your dashboard.
4. Go back to ACF > Field Groups, edit the original group (the only one left), and select the multilingual mode "Same fields across languages". This setting allows you to use the same group and translate the value of each field.
For more information, visit https://wpml.org/documentation/related-projects/translate-sites-built-with-acf/
It's important to note that in that particular case, the client was also experiencing an issue related to permalink manager.
If this solution does not resolve your issue or seems outdated, we recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 problem persists, please open a new support ticket at WPML support forum.
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