diff --git a/404.html b/404.html
index 099d13c6..d24d6aea 100644
--- a/404.html
+++ b/404.html
@@ -22,6 +22,13 @@
     const locale = getLocaleFromPath();
     const ph = await fetchPlaceholders(`/${locale}`);
 
+    // Set the locale meta tag
+    const metaLocale = document.createElement('meta');
+    const head = document.querySelector('head');
+    metaLocale.name = 'locale';
+    metaLocale.content = locale;
+    head.appendChild(metaLocale);
+
     window.addEventListener('load', () => {
       if (document.referrer) {
         const { origin, pathname } = new URL(document.referrer);