Ticket #8729: filter-core-update-locale.diff

wp-includes/update.php

@@ -30 +30 @@
         if ( ! is_object($current) )
                 $current = new stdClass;
 
-        $locale = get_locale();
+        $locale = apply_filters( 'core_version_check_locale', get_locale() );
         if (
                 isset( $current->last_checked ) &&
                 43200 > ( time() - $current->last_checked ) &&