diff --git a/wled00/data/404mini.htm b/wled00/data/404mini.htm
index 28044502..903fdbb8 100644
--- a/wled00/data/404mini.htm
+++ b/wled00/data/404mini.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 	<head>
 		<meta charset="utf-8">
 		<meta content='width=device-width' name='viewport'>
diff --git a/wled00/data/cpal/cpal.htm b/wled00/data/cpal/cpal.htm
index 773c02d2..8dabb23f 100644
--- a/wled00/data/cpal/cpal.htm
+++ b/wled00/data/cpal/cpal.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
     <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
     <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
diff --git a/wled00/data/dmxmap.htm b/wled00/data/dmxmap.htm
index 25953b0e..2b821c1e 100644
--- a/wled00/data/dmxmap.htm
+++ b/wled00/data/dmxmap.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html><head><meta content='width=device-width' name='viewport'>
+<html lang="en"><head><meta content='width=device-width' name='viewport'>
 <title>DMX Map</title>
 <script>function B(){window.history.back()};function RS(){window.location = "/settings";}function RP(){top.location.href="/";}function FM() {
   var dmxlabels = ["SET 0","RED","GREEN","BLUE","WHITE","SHUTTER","SET 255", "DISABLED"];
diff --git a/wled00/data/icons-ui/demo.html b/wled00/data/icons-ui/demo.html
index 0416231f..bf5d4eeb 100644
--- a/wled00/data/icons-ui/demo.html
+++ b/wled00/data/icons-ui/demo.html
@@ -1,5 +1,5 @@
 <!doctype html>
-<html>
+<html lang="en">
 <head>
     <meta charset="utf-8">
     <title>IcoMoon Demo</title>
diff --git a/wled00/data/liveview.htm b/wled00/data/liveview.htm
index 6bff678e..988cf420 100644
--- a/wled00/data/liveview.htm
+++ b/wled00/data/liveview.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
   <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
   <meta charset="utf-8">
diff --git a/wled00/data/liveviewws.htm b/wled00/data/liveviewws.htm
index 0689b201..37d46815 100644
--- a/wled00/data/liveviewws.htm
+++ b/wled00/data/liveviewws.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
   <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
   <meta charset="utf-8">
diff --git a/wled00/data/liveviewws2D.htm b/wled00/data/liveviewws2D.htm
index 1fdf90b6..8636c336 100644
--- a/wled00/data/liveviewws2D.htm
+++ b/wled00/data/liveviewws2D.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
 	<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
 	<meta charset="utf-8">
diff --git a/wled00/data/msg.htm b/wled00/data/msg.htm
index bb598338..e933e863 100644
--- a/wled00/data/msg.htm
+++ b/wled00/data/msg.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 
 <head>
 	<meta content='width=device-width' name='viewport'>
diff --git a/wled00/data/pixart/pixart.htm b/wled00/data/pixart/pixart.htm
index c67ac46a..8c0e9773 100644
--- a/wled00/data/pixart/pixart.htm
+++ b/wled00/data/pixart/pixart.htm
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
     <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
     <meta http-equiv="Pragma" content="no-cache">
diff --git a/wled00/xml.cpp b/wled00/xml.cpp
index 6a2a517b..13ac2247 100644
--- a/wled00/xml.cpp
+++ b/wled00/xml.cpp
@@ -112,7 +112,7 @@ void URL_response(AsyncWebServerRequest *request)
   obuf = sbuf;
   olen = 0;
 
-  oappend(SET_F("<html><body><a href=\""));
+  oappend(SET_F("<html lang=\"en\"><body><a href=\""));
   oappend(s2buf);
   oappend(SET_F("\" target=\"_blank\">"));
   oappend(s2buf);
