diff --git a/404.html b/404.html
index 3956e97..d594f45 100644
--- a/404.html
+++ b/404.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="cs">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
diff --git a/hardware.html b/hardware.html
index 151ac5a..9b376c9 100644
--- a/hardware.html
+++ b/hardware.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="cs">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
diff --git a/index.html b/index.html
index 7d870ff..f331d17 100644
--- a/index.html
+++ b/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="cs">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
diff --git a/privacy.html b/privacy.html
index b2ed80b..9234d4c 100644
--- a/privacy.html
+++ b/privacy.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="cs">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
diff --git a/projects.html b/projects.html
index b5cadea..474f4b7 100644
--- a/projects.html
+++ b/projects.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="cs">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">