diff --git a/application/Utils.php b/application/Utils.php
index a4da41ac6..4f0e27fc0 100644
--- a/application/Utils.php
+++ b/application/Utils.php
@@ -522,7 +522,11 @@ function get_locale(int $category = LC_CTYPE)
     var_dump('$locale');
     var_dump($locale);
 
-    if ($locale === 'C' && class_exists('Locale') && method_exists('Locale', 'canonicalize')) {
+    if (
+        ($locale === 'C' || startsWith($locale, 'C.'))
+        && class_exists('Locale')
+        && method_exists('Locale', 'canonicalize')
+    ) {
         $locale = Locale::canonicalize($locale);
         var_dump($locale);
     }