Problem: You want to set en_GB as the primary language and en_US as the secondary language during WPML setup. Solution: We recommend you navigate to WPML > Languages > Edit languages and change the value for "default locale" from "en_US" to "en_GB". Then, save the settings. For more details, visit our guide on editing WPML's languages table. Next, go to Dashboard > Updates, and at the bottom section, you should see a button that will prompt you to download the latest translations (language files).
If this solution does not apply to your situation because it might be outdated or not relevant to your specific case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the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 you still need assistance, please open a new support ticket at WPML support forum.
