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Problem:
You want to configure your WordPress server behind a reverse proxy, changing the URL accessibility for public and internal use. You are concerned about whether translators can work via VPN, if automatic translation will function, and if there are implications for WPML registration and updates.
Solution:
1. Translators with VPN access can work as long as the WordPress REST API endpoints are accessible internally.
2. Automatic translation requires public access to specific REST API endpoints via the reverse proxy.
3. Register your WPML site using the reverse proxy URL to ensure WPML can communicate for registration verification, updates, and translation management.
4. Ensure your server can initiate outbound HTTPS connections to

,

, and

.
5. Check the WPML Installer Support log for connectivity issues by navigating to WPML > Support and reviewing the Installer Log section.

If this solution does not resolve your issue or seems outdated, please check the related known issues and confirm that you have the latest versions of themes and plugins installed. If problems persist, we recommend opening a new support ticket. For further assistance, visit our support forum.