diff --git a/404.html b/404.html
index f908bba..2f1ebe0 100644
--- a/404.html
+++ b/404.html
@@ -19,5 +19,32 @@
   <p class="output">Please try to <a href="javascript:history.back()">go back</a> or <a href="/">return to the homepage</a>.</p>
   <p class="output">Good luck.</p>
 </div>
+<script>
+      document.addEventListener('DOMContentLoaded', () => {
+  const userLang = navigator.language || navigator.userLanguage;
+
+  // İçeriği dil tercihine göre yönlendirme
+  if (userLang.startsWith('tr')) {
+    window.location.href = '/home_tr'; // Türkçe içerik
+  } else {
+    window.location.href = '/home_en'; // İngilizce içerik
+  }
+});
+      
+      const disabledKeys = ["c", "C", "x", "J", "u", "I"]; // keys that will be disabled
+      const showAlert = e => {
+        e.preventDefault(); // preventing its default behaviour
+        return alert("Sorry, you can't view or copy source codes this way!");
+      }
+      document.addEventListener("contextmenu", e => {
+        showAlert(e); // calling showAlert() function on mouse right click
+      });
+      document.addEventListener("keydown", e => {
+        // calling showAlert() function, if the pressed key matched to disabled keys
+        if((e.ctrlKey && disabledKeys.includes(e.key)) || e.key === "F12") {
+          showAlert(e);
+        }
+      });
+</script>
 </body>
 </html>