Version ISPConfig 3.3.x (Debian 12, Nginx + PHP-FPM stack) Module System → System Config → Sites Context Nginx server (no Apache) 1. Wrong label for the PHP handler field The field is displayed as: Code: PHP Handler (Apache only) Current key: Code: $wb['web_php_options_txt'] = 'PHP Handler (Apache only)'; This label is wrong on a Nginx system, because: – PHP-FPM is used under Nginx; – this setting actually controls the PHP runtime behaviour; – marking it as “Apache only” is misleading and factually incorrect. → The label should be generic (e.g. PHP handler) or conditional depending on the web server in use. 2. Missing web_php_options_notempty language key When the PHP handler field is left empty, the UI displays: Code: web_php_options_notempty web_php_options_notempty This key does not exist in any language file, in particular not in: /usr/local/ispconfig/interface/web/admin/lib/lang/en_system_config.lng It is also missing from all other locales. 3. The key is not resolved even if it is added Even if the key is manually added to en_system_config.lng (or any locale), e.g.: Code: $wb['web_php_options_notempty'] = 'PHP handler must not be empty'; the UI still displays: Code: web_php_options_notempty web_php_options_notempty → The validation system does not resolve the key through the language system. This is a binding bug between validation and i18n. 4. The message is displayed twice The error message appears twice, which indicates: –either the field is validated twice, – or the error is injected twice into the form renderer. This makes the issue even more visible and confirms a bug in the UI validation layer. Impact – Internal language keys are shown to users instead of real messages. – The “Apache only” label is factually wrong on Nginx systems. – Validation is broken (unresolved key + duplicated message). These are UI, i18n and validation bugs, not a simple translation issue.