function bbp_format_buddypress_notifications( $content, $item_id, $secondary_item_id, $action_item_count, $format, $component_action_name, $component_name, $id ) {

	// Bail if not the notification action we are looking for
	if ( 'bbp_new_reply' !== $component_action_name ) {
		return $content;
	}

	// New reply notifications
	$topic_id    = bbp_get_reply_topic_id( $item_id );
	$topic_title = bbp_get_topic_title( $topic_id );
	$topic_link  = wp_nonce_url(
		add_query_arg(
			array(
				'action'   => 'bbp_mark_read',
				'topic_id' => $topic_id
			),
			bbp_get_reply_url( $item_id )
		),
		'bbp_mark_topic_' . $topic_id
	);

	// Cast to int
	$action_item_count = (int) $action_item_count;

	// Multiple
	if ( $action_item_count > 1 ) {
		$filter = 'bbp_multiple_new_subscription_notification';
		$text   = sprintf( esc_html__( 'You have %d new replies', 'bbpress' ), $action_item_count );

	// Single
	} else {
		$filter = 'bbp_single_new_subscription_notification';
		$text   = ! empty( $secondary_item_id )
			? sprintf( esc_html__( 'You have %d new reply to %2$s from %3$s', 'bbpress' ), $action_item_count, $topic_title, bp_core_get_user_displayname( $secondary_item_id ) )
			: sprintf( esc_html__( 'You have %d new reply to %s',             'bbpress' ), $action_item_count, $topic_title );
	}

	// WordPress Toolbar
	if ( 'string' === $format ) {
		$return = apply_filters( $filter, '<a href="' . esc_url( $topic_link ) . '" title="' . esc_attr__( 'Topic Replies', 'bbpress' ) . '">' . esc_html( $text ) . '</a>', $action_item_count, $text, $topic_link );

	// Deprecated BuddyBar
	} else {
		$return = apply_filters( $filter, array(
			'text' => $text,
			'link' => $topic_link
		), $topic_link, $action_item_count, $text, $topic_title );
	}

	do_action( 'bbp_format_buddypress_notifications', $component_action_name, $item_id, $secondary_item_id, $action_item_count, $format, $component_action_name, $component_name, $id );

	return $return;
}