Fixed issues with default locale (#5452)

app/controllers/api/v1/sessions_controller.rb

@@ -26,7 +26,7 @@ module Api
       def index
         return render_data data: current_user, serializer: CurrentUserSerializer, status: :ok if current_user
 
-        render_data data: { signed_in: false }, status: :ok
+        render_data data: { signed_in: false, default_locale: ENV.fetch('DEFAULT_LOCALE') }, status: :ok
       end
 
       # POST /api/v1/sessions

app/javascript/contexts/auth/AuthProvider.jsx

@@ -38,7 +38,7 @@ export default function AuthProvider({ children }) {
     provider: currentUser?.provider,
     avatar: currentUser?.avatar,
     signed_in: currentUser?.signed_in ?? false,
-    language: currentUser?.language || window.navigator.language || window.navigator.userLanguage,
+    language: currentUser?.language || currentUser?.default_locale || window.navigator.language || window.navigator.userLanguage,
     permissions: currentUser?.permissions,
     role: currentUser?.role,
     verified: currentUser?.verified,

config/application.rb

@@ -82,5 +82,7 @@ module Greenlight
     # Fetch 'RELATIVE_URL_ROOT' ENV variable value while removing any trailing slashes.
     config.relative_url_root = ENV.fetch('RELATIVE_URL_ROOT', nil)&.sub(%r{/*\z}, '')
     config.relative_url_root = '/' if config.relative_url_root.blank?
+
+    I18n.load_path += Dir[Rails.root.join('config/locales/*.{rb,yml}').to_s]
   end
 end

sample.env

@@ -69,7 +69,7 @@ REDIS_URL=
 #GCS_CLIENT_CERT=
 
 # Define the default locale language code (i.e. 'en' for English) from the following list:
-#  [en, ar, fr, es]
+#  [en, ar, fr, es, fa_IR]
 #DEFAULT_LOCALE=en
 
 # Set this if you like to deploy Greenlight on a relative root path other than /