+                                       ->scalarNode('locale')->cannotBeEmpty()->defaultValue($defaults['locale'])->end()
+                                       ->scalarNode('locales')->cannotBeEmpty()->defaultValue($defaults['locales'])->end()
+                                       ->scalarNode('languages')->cannotBeEmpty()->defaultValue($defaults['languages'])->end()
+                                       /*->arrayNode('languages')
+                                               ->treatNullLike([])
+                                               ->defaultValue($defaults['languages'])
+                                               ->scalarPrototype()->end()
+                                       ->end()*/