login error and mutlitlingual login flow

locales/en/home.json

@@ -21,6 +21,7 @@
     "login-card-register-link": "Register",
     "login-card-forgotten-label": "I have forgotten my password",
     "login-card-forgotten-link": "Click here",
+    "login-via-gov-gateway-label": "Log in via Government Gateway",
     "casesearch-card-title": "Search appeals and Developments of National Significance",
     "casesearch-card-search-hint": "Use the case reference or DNS title to search. Case reference will be similar to one of the following:",
     "casesearch-card-search-example-label-1": "APP-A12345-A-21-1234567",
@@ -37,5 +38,7 @@
     "inspectorate-card-alt-text": "The Planning Inspectorate",
     "dns-card-title": "View all Developments of National Significance ",
     "dns-card-paragraph": "A Development of National Significance is a type of planning application for a large infrastructure project of national importance.",
-    "dns-card-button": "View all applications"
+    "dns-card-button": "View all applications",
+    "logging-in-heading": "Logging in",
+    "logging-in-paragraph": "Please wait..."
 }