->defaultValue($defaults['translate'])
                                                ->scalarPrototype()->end()
                                        ->end()
+                                       #TODO: see if we can't prevent key normalisation with ->normalizeKeys(false)
                                        ->scalarNode('locales')->cannotBeEmpty()->defaultValue($defaults['locales'])->end()
+                                       #TODO: see if we can't prevent key normalisation with ->normalizeKeys(false)
                                        ->arrayNode('languages')
                                                ->treatNullLike([])
                                                ->defaultValue($defaults['languages'])