diff --git a/CHANGELOG-WIP.md b/CHANGELOG-WIP.md
index 7323d9a9b49..a1bd1b0ca9e 100644
--- a/CHANGELOG-WIP.md
+++ b/CHANGELOG-WIP.md
@@ -9,3 +9,6 @@
 ### Extensibility
 - Added `craft\web\ErrorHandler::exceptionAsArray()`.
 - Added `craft\web\ErrorHandler::showExceptionDetails()`.
+
+### System
+- Craft now calls `setlocale()` based on the target language, so that `SORT_LOCALE_STRING` behaves as expected. ([#14509](https://github.com/craftcms/cms/issues/14509), [#14513](https://github.com/craftcms/cms/pull/14513))
diff --git a/src/base/ApplicationTrait.php b/src/base/ApplicationTrait.php
index 086faf1ec3a..68c2fad9c8f 100644
--- a/src/base/ApplicationTrait.php
+++ b/src/base/ApplicationTrait.php
@@ -342,6 +342,12 @@ public function updateTargetLanguage(?bool $useUserLanguage = null): void
         }
 
         $this->language = $this->getTargetLanguage($useUserLanguage);
+        setlocale(
+            LC_COLLATE,
+            str_replace('-', '_', $this->language), // target language
+            'C.UTF-8',  // libc >= 2.13
+            'C.utf8' // different spelling
+        );
         $this->_gettingLanguage = false;
     }