Search in language fields, but do filter on language only if isMultil…

…ingual

src/components/Searchkit/CustomESRequestSerializer.jsx

@@ -1,6 +1,10 @@
 import { extend, isEmpty, keyBy, trim } from 'lodash';
 import { getObjectFromObjectList } from '../helpers.jsx';
 
+import config from '@plone/volto/registry';
+
+const volto_config = config;
+
 export class CustomESRequestSerializer {
   constructor(config) {
     this.reviewstatemapping = config.reviewstatemapping;
@@ -254,7 +258,8 @@ export class CustomESRequestSerializer {
     // Generate terms of global filters
     let terms = [];
     // If isMultilingual, search only in language
-    this.language && terms.push({
+
+    this.language && volto_config.settings.isMultilingual && terms.push({
       terms: {
         language: [this.language],
       },

src/components/Views/FacetedSearch.jsx

@@ -709,7 +709,7 @@ const FacetedSearch = ({ data, overriddenComponents }) => {
   };
 
   // TODO Check if check on client could be made simpler
-  const language = useSelector((state) => config.settings.isMultilingual ? state.intl.locale : null);
+  const language = useSelector((state) => state.intl.locale);
   const [isClient, setIsClient] = React.useState(null);
   React.useEffect(() => setIsClient(true), []);