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Problem:
The client reported that the language switcher has stopped working and no longer switches the language. The secondary language is configured as a different domain.
Solution:
We recommend checking if the English version of the homepage exists and is published. You can do this by navigating to Pages → All Pages in your WordPress dashboard. If the page is missing, you will need to create or translate it to ensure the language switcher can function correctly.

If this solution does not resolve your issue or seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 the problem persists, please open a new support ticket.