Update

locale/function.js.php

@@ -0,0 +1,39 @@
+<?php
+
+if (empty($_GET['lang'])) {
+    return '';
+}
+
+$lang = preg_replace('/[^a-z0-9_]/i', '', $_GET['lang']);
+
+$langFile = "./{$lang}.php";
+if(!file_exists($langFile)){
+    return '';
+}
+
+include_once $langFile;
+header('Content-Type: application/javascript');
+?>
+var translations = <?php echo json_encode($t); ?>;
+
+function __(str, allowHTML = false) {
+    let returnStr = str;
+    
+    // Check if translation exists for exact string
+    if (translations.hasOwnProperty(str)) {
+        returnStr = translations[str];
+    } else {
+        // Case insensitive check
+        let lowerCaseKey = Object.keys(translations).find(key => key.toLowerCase() === str.toLowerCase());
+        if (lowerCaseKey) {
+            returnStr = translations[lowerCaseKey];
+        }
+    }
+
+    if (allowHTML) {
+        return returnStr;
+    }
+
+    // Escape certain characters for security
+    return returnStr.replace(/'/g, "&apos;").replace(/"/g, "&quot;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+}