Custom Post Types and MLS

Thanks for this great plugin!

Quick question: what´s the best way to localize custom post types?

At the moment I have set up two different post types: activities (en_US) and actividades (es_ES).

This results in this permalink structure:

1. example.com/activities/english-activity/
2. example.com/es/actividades/spanish-activity/

I´d like to connect the English post type to the Spanish post type.

I´ve used your permalink filter in the functions.php file of my Spanish site and updated permalinks settings. However MLS doesn´t seem to find a translatable post yet.

I´ll look into this further, just wondering if you could tell me if I´m on the right track or if I should take a different approach.

Here´s the filter I used:

function my_msls_options_get_permalink( $url, $language ) {
    if ( 'es_ES' == $language ) {
        $url = str_replace( '/activities/', '/actividades/', $url );
    }
    return $url;
}
add_filter( 'msls_options_get_permalink', 'my_msls_options_get_permalink', 10, 2 );

http://wordpress.org/extend/plugins/multisite-language-switcher/