I forgot i was talking about posts created WHITOUT the multilingual support active.
Create post while support is active and then deactivate it, will show the post in the loop, but that's not the point.
But i think i have resolved in this way:
$loop = new WP_Query(array('post_type' => 'post', 'paged' => get_query_var('paged'), 'posts_per_page' => 10));
while ( $loop->have_posts() ) : $loop->the_post();