Ticket #21726: 21726.patch

wp-admin/includes/schema.php

@@ -901 +901 @@
                 'global_terms_enabled' => global_terms_enabled() ? '1' : '0',
                 'initial_db_version' => get_option( 'initial_db_version' ),
                 'active_sitewide_plugins' => array(),
+                'WPLANG' => get_locale(),
         );
         if ( ! $subdomain_install )
                 $sitemeta['illegal_names'][] = 'blog';