function bp_core_get_directory_page_default_titles() {
	$page_default_titles = array(
		'activity' => _x( 'Activity', 'Page title for the Activity directory.',       'buddypress' ),
		'groups'   => _x( 'Groups',   'Page title for the Groups directory.',         'buddypress' ),
		'blogs'    => _x( 'Sites',    'Page title for the Sites directory.',          'buddypress' ),
		'members'  => _x( 'Members',  'Page title for the Members directory.',        'buddypress' ),
		'activate' => _x( 'Activate', 'Page title for the user activation screen.',   'buddypress' ),
		'register' => _x( 'Register', 'Page title for the user registration screen.', 'buddypress' ),
	);

	/**
	 * Filters the default page titles array
	 *
	 * @since 2.7.0
	 *
	 * @param array $page_default_titles the array of default WP (post_title) titles.
	 */
	return apply_filters( 'bp_core_get_directory_page_default_titles', $page_default_titles );
}