fix dutch language selection

doc/i18n.md

@@ -13,6 +13,7 @@ JSON-based translation system. Translations are loaded from static files, cached
 | Portuguese | `pt` | `static/locales/pt.json` |
 | Persian | `fa` | `static/locales/fa.json` |
 | Chinese | `zh` | `static/locales/zh.json` |
+| Dutch | `nl` | `static/locales/nl.json` |
 
 Default locale: **en** (English).
 

static/js/core/i18n.js

@@ -13,7 +13,7 @@ let currentLocale =
 
 // Supported locales (languages that have locale files on the server)
 // When a locale file is not found, the system gracefully falls back to English
-const supportedLocales = ['en', 'es', 'zh', 'fa', 'fr', 'de', 'pt'];
+const supportedLocales = ['en', 'es', 'zh', 'fa', 'fr', 'de', 'pt', 'nl'];
 
 // Fallback to English if locale is not supported
 if (!supportedLocales.includes(currentLocale)) {

static/js/core/languageSelector.js

@@ -18,6 +18,7 @@ function getAvailableLanguages() {
         { code: 'de', name: 'Deutsch', flag: '🇩🇪' },
         { code: 'pt', name: 'Português', flag: '🇧🇷' },
         { code: 'it', name: 'Italiano', flag: '🇮🇹' }
+        { code: 'nl', name: 'Nederlands', flag: '🇳🇱' }
     ];
 }