diff --git a/scripts/main_page.js b/scripts/main_page.js
index 57a59c7..16dc02f 100644
--- a/scripts/main_page.js
+++ b/scripts/main_page.js
@@ -6,6 +6,8 @@ if (lang != "en" && lang != "de") {
     lang = "en";
 }
 
+document.documentElement.lang = lang;
+
 history.scrollRestoration = "manual";
 
 function saveScroll() {