Christopher Idemmili

Problem:
The client was experiencing an issue where their site would switch back to English immediately after selecting Spanish, despite using WPML for language management. The problem was identified to be caused by the Simply Static Pro plugin, which was redirecting users based on browser language settings.
Solution:
We recommended disabling the browser language redirection feature in WPML and checking for any other plugins that might cause redirection. The client discovered that Simply Static Pro has a feature that redirects based on the browser's configured language. To resolve this, the client used the following code snippet to disable the redirection:

add_filter('ssp_use_geo_redirect', '__return_false');

For more details on this solution, visit Simply Static documentation.

If this solution does not apply to your case, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 issues persist, please open a new support ticket at WPML support forum.