diff --git a/public/home/chapters/02_mobility.html b/public/home/chapters/02_mobility.html
index 719cacf85a2c39f4d09399a22320106f478062e7..2c8fd38159aeb81f835ead9ee619435f5dfd7ddf 100644
--- a/public/home/chapters/02_mobility.html
+++ b/public/home/chapters/02_mobility.html
@@ -1,5 +1,5 @@
<!DOCTYPE html>
-<html>
+<html lang="de">
<head>
<meta charset="utf-8">