diff --git a/public/main/auth/inscription.php b/public/main/auth/inscription.php
index a2fb8cc15a..a9b148cc0a 100644
--- a/public/main/auth/inscription.php
+++ b/public/main/auth/inscription.php
@@ -1171,9 +1171,9 @@ if ($form->validate()) {
     $recipient_name = api_get_person_name($values['firstname'], $values['lastname']);
     $textAfterRegistration =
         '<p>'.
-        get_lang('Dear').' '.
+        get_lang('Dear', $userEntity->getLocale()).' '.
         stripslashes(Security::remove_XSS($recipient_name)).',<br /><br />'.
-        get_lang('Your personal settings have been registered')."</p>";
+        get_lang('Your personal settings have been registered', $userEntity->getLocale())."</p>";
 
     $formData = [
         'button' => Display::button(
@@ -1205,11 +1205,11 @@ if ($form->validate()) {
     } else {
         if (!empty($values['email'])) {
             $linkDiagnostic = api_get_path(WEB_PATH).'main/search/search.php';
-            $textAfterRegistration .= '<p>'.get_lang('An e-mail has been sent to remind you of your login and password').'</p>';
+            $textAfterRegistration .= '<p>'.get_lang('An e-mail has been sent to remind you of your login and password', $userEntity->getLocale()).'</p>';
             $diagnosticPath = '<a href="'.$linkDiagnostic.'" class="custom-link">'.$linkDiagnostic.'</a>';
             $textAfterRegistration .= '<p>';
             $textAfterRegistration .= sprintf(
-                            get_lang('Welcome, please go to diagnostic at %s.'),
+                            get_lang('Welcome, please go to diagnostic at %s.', $userEntity->getLocale()),
                             $diagnosticPath
             );
             $textAfterRegistration .= '</p>';
diff --git a/public/main/inc/lib/usermanager.lib.php b/public/main/inc/lib/usermanager.lib.php
index ea951bbd16..f5a3d7d378 100644
--- a/public/main/inc/lib/usermanager.lib.php
+++ b/public/main/inc/lib/usermanager.lib.php
@@ -315,6 +315,7 @@ class UserManager
         $userId = $user->getId();
 
         if (!empty($userId)) {
+            $userLocale = $user->getLocale();
             if ($isAdmin) {
                 self::addUserAsAdmin($user);
             }
@@ -377,7 +378,7 @@ class UserManager
                     PERSON_NAME_EMAIL_ADDRESS
                 );
                 $tpl = Container::getTwig();
-                $emailSubject = $tpl->render('@ChamiloCore/Mailer/Legacy/subject_registration_platform.html.twig');
+                $emailSubject = $tpl->render('@ChamiloCore/Mailer/Legacy/subject_registration_platform.html.twig', ['locale' => $userLocale]);
                 $sender_name = api_get_person_name(
                     api_get_setting('administratorName'),
                     api_get_setting('administratorSurname'),
@@ -405,6 +406,7 @@ class UserManager
                     'mailWebPath' => $url,
                     'new_user' => $user,
                     'search_link' => $url,
+                    'locale' => $userLocale,
                 ];
 
                 // ofaj
diff --git a/src/CoreBundle/Resources/views/Mailer/Legacy/content_registration_platform.html.twig b/src/CoreBundle/Resources/views/Mailer/Legacy/content_registration_platform.html.twig
index 76f8e594ef..86fa84ea5f 100644
--- a/src/CoreBundle/Resources/views/Mailer/Legacy/content_registration_platform.html.twig
+++ b/src/CoreBundle/Resources/views/Mailer/Legacy/content_registration_platform.html.twig
@@ -1,21 +1,24 @@
+{% set user_locale = locale is defined ? locale : 'en' %}
+{% trans_default_domain 'messages' %}
+
 {% autoescape false %}
-    <p>{{ 'Dear'|trans }} {{ complete_name }},</p>
-    <p>{{ 'Welcome to this platform'|trans }}</p>
-    <p>{{ 'You are registered to'|trans }} {{ 'platform.site_name' | api_get_setting }} {{ 'with the following settings:'|trans }}</p>
-    <p>{{ 'Username'|trans }} : {{ login_name }}<br>
-        {{ 'Pass'|trans }} : {{ original_password }}</p>
-    <p>{{ 'For more details visit %s'|trans|format(search_link) }}</p>
-    <p>{{ 'In case of trouble, contact us.'|trans }}</p>
+    <p>{{ 'Dear'|trans({}, 'messages', user_locale) }} {{ complete_name }},</p>
+    <p>{{ 'Welcome to this platform'|trans({}, 'messages', user_locale) }}</p>
+    <p>{{ 'You are registered to'|trans({}, 'messages', user_locale) }} {{ 'platform.site_name' | api_get_setting }} {{ 'with the following settings:'|trans({}, 'messages', user_locale) }}</p>
+    <p>{{ 'Username'|trans({}, 'messages', user_locale) }} : {{ login_name }}<br>
+        {{ 'Pass'|trans({}, 'messages', user_locale) }} : {{ original_password }}</p>
+    <p>{{ 'For more details visit %s'|trans({'%s': search_link}, 'messages', user_locale) }}</p>
+    <p>{{ 'In case of trouble, contact us.'|trans({}, 'messages', user_locale) }}</p>
 
-    <p>{{ 'Sincerely'|trans }}</p>
+    <p>{{ 'Sincerely'|trans({}, 'messages', user_locale) }}</p>
     <p>{{ 'admin.administrator_name' | api_get_setting }} {{ 'admin.administrator_surname' | api_get_setting }}<br />
-        {{ 'Manager'|trans }} {{ 'platform.site_name' | api_get_setting }}<br />
+        {{ 'Manager'|trans({}, 'messages', user_locale) }} {{ 'platform.site_name' | api_get_setting }}<br />
 
         {% if 'admin.administrator_phone' | api_get_setting %}
             {{ 'T. ' ~ 'admin.administrator_phone' | api_get_setting }}<br />
         {% endif %}
         {% if 'admin.administrator_email' | api_get_setting %}
-            {{ 'Email'|trans ~ ': ' ~ 'admin.administrator_email' | api_get_setting }}
+            {{ 'Email'|trans({}, 'messages', user_locale) ~ ': ' ~ 'admin.administrator_email' | api_get_setting }}
         {% endif %}
     </p>
 {% endautoescape %}
diff --git a/src/CoreBundle/Resources/views/Mailer/Legacy/subject_registration_platform.html.twig b/src/CoreBundle/Resources/views/Mailer/Legacy/subject_registration_platform.html.twig
index b2f670c745..4741c94620 100644
--- a/src/CoreBundle/Resources/views/Mailer/Legacy/subject_registration_platform.html.twig
+++ b/src/CoreBundle/Resources/views/Mailer/Legacy/subject_registration_platform.html.twig
@@ -1 +1,4 @@
-{{ '['~ 'platform.site_name' | api_get_setting ~ '] ' ~ 'Your Reg'|trans ~ ' ' ~ 'platform.site_name' | api_get_setting }}
+{% set user_locale = locale is defined ? locale : 'en' %}
+{% trans_default_domain 'messages' %}
+
+{{ '['~ 'platform.site_name' | api_get_setting ~ '] ' ~ 'Your Reg'|trans({}, 'messages', user_locale) ~ ' ' ~ 'platform.site_name' | api_get_setting }}