diff --git a/src/vector/index.js b/src/vector/index.js
index b8291dcfd1..a00af4f8a5 100644
--- a/src/vector/index.js
+++ b/src/vector/index.js
@@ -387,6 +387,7 @@ async function loadLanguage() {
     }
     try {
         await languageHandler.setLanguage(langs);
+        document.documentElement.setAttribute("lang", languageHandler.getCurrentLanguage());
     } catch (e) {
         console.error("Unable to set language", e);
     }