diff --git a/core/templates/layout.base.php b/core/templates/layout.base.php
index 0529521bcdd..2d4fc726661 100644
--- a/core/templates/layout.base.php
+++ b/core/templates/layout.base.php
@@ -1,5 +1,5 @@
-
+
diff --git a/core/templates/layout.guest.php b/core/templates/layout.guest.php
index a53cd82fcfd..ae685959351 100644
--- a/core/templates/layout.guest.php
+++ b/core/templates/layout.guest.php
@@ -1,5 +1,5 @@
<!DOCTYPE html>
-<html class="ng-csp" data-placeholder-focus="false" lang="<?php p($_['language']); ?>" >
+<html class="ng-csp" data-placeholder-focus="false" lang="<?php p($_['language']); ?>" data-locale="<?php p($_['locale']); ?>" >
<head data-requesttoken="<?php p($_['requesttoken']); ?>">
<meta charset="utf-8">
<title>
diff --git a/core/templates/layout.public.php b/core/templates/layout.public.php
index abd7e942c04..78f46f48a5a 100644
--- a/core/templates/layout.public.php
+++ b/core/templates/layout.public.php
@@ -1,5 +1,5 @@
<!DOCTYPE html>
-<html class="ng-csp" data-placeholder-focus="false" lang="<?php p($_['language']); ?>" >
+<html class="ng-csp" data-placeholder-focus="false" lang="<?php p($_['language']); ?>" data-locale="<?php p($_['locale']); ?>" >
<head data-user="<?php p($_['user_uid']); ?>" data-user-displayname="<?php p($_['user_displayname']); ?>" data-requesttoken="<?php p($_['requesttoken']); ?>">
<meta charset="utf-8">
<title>