Ticket #31319: 31319.diff

wp-includes/l10n.php

@@ -942 +942 @@
                         $structure[] = sprintf(
                                 '<option value="%s" lang="%s"%s>%s</option>',
                                 esc_attr( $translation['language'] ),
-                                esc_attr( $translation['iso'][1] ),
+                                esc_attr( array_shift( $translation['iso'] ) ),
                                 selected( $translation['language'], $args['selected'], false ),
                                 esc_html( $translation['native_name'] )
                         );