Add config option to set locale

app/controllers/rails_admin/application_controller.rb

@@ -16,6 +16,7 @@ class ApplicationController < Config.parent_controller.constantize
     before_action :_authenticate!
     before_action :_authorize!
     before_action :_audit!
+    before_action :_set_locale!
 
     helper_method :_current_user, :_get_plugin_name
 
@@ -58,6 +59,10 @@ def _audit!
       instance_eval(&RailsAdmin::Config.audit_with)
     end
 
+    def _set_locale!
+      I18n.locale = RailsAdmin.config.locale if RailsAdmin.config.locale
+    end
+
     def rails_admin_controller?
       true
     end

lib/rails_admin/config.rb

@@ -78,6 +78,9 @@ class << self
       # yell about fields that are not marked as accessible
       attr_accessor :yell_for_non_accessible_fields
 
+      # set locale for rails_admin
+      attr_accessor :locale
+
       # Setup authentication to be run as a before filter
       # This is run inside the controller instance so you can setup any authentication you need to
       #

spec/controllers/rails_admin/application_controller_spec.rb

@@ -39,4 +39,12 @@
       expect(controller.send(:rails_admin_controller?)).to be true
     end
   end
+
+  describe '#_set_locale!' do
+    it 'works with config' do
+      RailsAdmin.config.locale = :fr
+      controller.send(:_set_locale!)
+      expect(I18n.locale).to eq(:fr)
+    end
+  end
 end