diff --git a/treeview.cpp b/treeview.cpp
--- a/treeview.cpp
+++ b/treeview.cpp
@@ -141,7 +141,9 @@
 {
     TreeItem *treeItem1 = static_cast<TreeItem *>(item1);
     TreeItem *treeItem2 = static_cast<TreeItem *>(item2);
-    return treeItem1->name().toLower() < treeItem2->name().toLower();
+    const QString lowerName1 = treeItem1->name().toLower();
+    const QString lowerName2 = treeItem2->name().toLower();
+    return (QString::localeAwareCompare(lowerName1, lowerName2) < 0);
 }
 
 /**
@@ -162,7 +164,7 @@
     if (description1.isEmpty() && description2.isEmpty()) {
         return itemNameLessThan(item1, item2);
     } else {
-        return description1 < description2;
+        return (QString::localeAwareCompare(description1, description2) < 0);
     }
 }