WordPress Bogo をカスタム投稿タイプでも使う ref: http://qiita.com/gatespace/items/75e70f5ae162c2962dcc

my_localizable_post_types1.php

<?php
/**
 * Support custom post type with bogo.
 *
 * @param array $localizable Supported post types.
 * @return array
 */
function my_localizable_post_types( $localizable ) {
    $localizable[] = 'custom_post_type_name';
    return $localizable;
}
add_filter( 'bogo_localizable_post_types', 'my_localizable_post_types', 10, 1 );

my_localizable_post_types2.php

<?php
/**
 * Support custom post type with bogo.
 *
 * @param array $localizable Supported post types.
 * @return array
 */
function my_localizable_post_types( $localizable ) {
    $args = array(
        'public'   => true,
        '_builtin' => false
    );
    $custom_post_types = get_post_types( $args );
    return array_merge( $localizable, $custom_post_types );
}
add_filter( 'bogo_localizable_post_types', 'my_localizable_post_types', 10, 1 );