Add App locate as default lang in the app.php config file instead of 'en' of 'lang' attribute in the main view.
@@ -1,5 +1,5 @@
<!DOCTYPE html>
-<html lang="en">
+<html lang="{{ config('app.locale') }}">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">