diff --git a/plugins/catalog/src/components/SystemDiagramCard/SystemDiagramCard.tsx b/plugins/catalog/src/components/SystemDiagramCard/SystemDiagramCard.tsx
index e2c48fe521..4297f67f79 100644
--- a/plugins/catalog/src/components/SystemDiagramCard/SystemDiagramCard.tsx
+++ b/plugins/catalog/src/components/SystemDiagramCard/SystemDiagramCard.tsx
@@ -50,7 +50,7 @@ function simplifiedEntityName(
   // Simplify the diagram output by hiding only the default namespace
   return serializeEntityRef(ref)
     .toString()
-    .toLowerCase()
+    .toLocaleLowerCase('en-US')
     .replace(':default/', ':');
 }