Como mudar o texto "POST" para "ARTIGOS"

gistfile1.aw

add_filter('gettext',  'change_post_to_article');
add_filter('ngettext',  'change_post_to_article');

function change_post_to_article($translated) {
     $translated = str_ireplace('Post',  'Artigos',  $translated);
     return $translated;
}