<feed
xmlns="http://www.w3.org/2005/Atom"
xmlns:thr="http://purl.org/syndication/thread/1.0"
- xml:lang="<?php echo get_option('rss_language'); ?>"
+ xml:lang="<?php bloginfo_rss( 'language' ); ?>"
xml:base="<?php bloginfo_rss('url') ?>/wp-atom.php"
<?php do_action('atom_ns'); ?>
>