diff --git a/_layouts/8702_B_2_poem.html b/_layouts/8702_B_2_poem.html
index f847bab..af317d0 100644
--- a/_layouts/8702_B_2_poem.html
+++ b/_layouts/8702_B_2_poem.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
diff --git a/_layouts/course_home.html b/_layouts/course_home.html
index e14520a..d872e18 100644
--- a/_layouts/course_home.html
+++ b/_layouts/course_home.html
@@ -2,7 +2,7 @@
 ---
 
 <!DOCTYPE html>
-<html>
+<html lang="en">
   {% include head.html %}
   <body>
     {% include header.html %}
diff --git a/_layouts/index.html b/_layouts/index.html
index c76d56b..5474276 100644
--- a/_layouts/index.html
+++ b/_layouts/index.html
@@ -2,7 +2,7 @@
 ---
 
 <!DOCTYPE html>
-<html>
+<html lang="en">
   {% include head.html %}
   <body>
     {% include header.html %}
diff --git a/_layouts/page.html b/_layouts/page.html
index c7a5961..ace3a22 100644
--- a/_layouts/page.html
+++ b/_layouts/page.html
@@ -2,7 +2,7 @@
 ---
 
 <!DOCTYPE html>
-<html>
+<html lang="en">
   {% include head.html %}
   <body>
     {% include header.html %}
