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To have the "Translate" tab listed on your module's configuration page you additionally need to provide a module_name.config_translation.yml in your module's root. module_name.settings: title: 'Module Name' base_route_name: module_name.admin_settings names: - module_name.settings Look for existing module_name.config_translation.yml file in core ...


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In page.html.twig and Drupal 8.7.6, I had to use: {% if language.id == 'en' %} or {{ language.id == 'en' ? 'active' : 'not-active' }} Other suggestions did not work.


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