Add translation filter in loginpage

modules/core/templates/login.twig

@@ -2,7 +2,7 @@
 {% extends "@core/base.twig" %}
 
 {% block content %}
-<h1>{{ pagetitle }}</h1>
+<h1>{{ pagetitle|trans }}</h1>
     <p>Please choose one of the following authentication methods: </p>
 
 {% if sources is empty -%}