diff --git a/map/map.html b/map/map.html
index 1a4ab95..be043c7 100644
--- a/map/map.html
+++ b/map/map.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="de">
   <head>
     <meta charset="UTF-8" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge" />
diff --git a/wave/wave.html b/wave/wave.html
index 14aa719..542adb9 100644
--- a/wave/wave.html
+++ b/wave/wave.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="de">
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
