Oleg Tymoshchuk

Problem:
The client is experiencing an issue where the WPML language switcher added to the footer with the shortcode

breaks the website instead of switching the language.
Solution:
1. Ensure that any redirection plugins are deactivated as they might interfere with the language switcher.
2. Perform a full backup of the website.
3. Deactivate any cache plugins that might be causing the issue, as confirmed by the client that deactivating these resolved the problem.
4. Check if the website and the language switcher function correctly after these adjustments.

If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent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 further assistance is needed, please open a new support ticket at WPML support forum.