added lang param to graphql thematique load

web/themes/custom/materiotheme/vuejs/components/Pages/Thematique.vue

@@ -106,7 +106,7 @@ export default {
       this.loading = true
 
       let ast = gql`{
-        route(path: "${this.path}") {
+        route(path: "${this.path}", lang: "${drupalDecoupled.lang_code}") {
           ...ThematiqueFields
         }
       }