diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9f3269dd5..ba56e65ff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,8 @@ You can also check the [release page](https://github.com/visualize-admin/visuali
 
 ## Unreleased
 
-Nothing yet.
+- Misc
+  - Improved `langString` error message
 
 # [3.22.4] - 2023-09-06
 
diff --git a/app/rdf/queries.ts b/app/rdf/queries.ts
index e2ac3670a..eeafe9469 100644
--- a/app/rdf/queries.ts
+++ b/app/rdf/queries.ts
@@ -780,8 +780,8 @@ const buildFilters = ({
     const { dataType } = parsedCubeDimension.data;
 
     if (ns.rdf.langString.value === dataType) {
-      console.warn(
-        `WARNING: Dimension <${iri}> has dataType 'langString'. Filtering won't work.`
+      throw new Error(
+        `Dimension <${iri}> has dataType 'langString', which is not supported by Visualize. In order to fix it, change the dataType to 'string' in the cube definition.`
       );
     }