Add dynamic var into "link_before/after" in wp_nav_menu, possible?

The reason is that I would like to show both languages on each items of the menu. I want to have nested code without re-write the whole menu thing by HTML(if possible..) , but based on wp_nav_menu.

Now i could only display the second language on each item separately from the menu via hooking wp_nav_menu_objects.

add_filter( 'wp_nav_menu_objects', 'lang_menu' );
function lang_menu( $items ) {
	foreach ( $items as $item ) {

		$post = get_page($item->object_id);
		$title = qtrans_use('fr', $post->post_title,false);
	}
	return $items;
}

Is it possible to take the var into the wp_nav_menu on each item in link_before/after as something like this?

'link_before'     => $items[$i],
//$items - second languages items
//$i - something like loop counter in wp_nav_menu on each item (I know it doesnt exist in core..)

wp_nav_menu reference:

wp_nav_menu($arg);
	$arg = array(
		'theme_location'  => 'header-menu',
		'menu'            => 'nav',
		'container'       => 'div',
		'container_class' => 'menu-{menu slug}-container',
		'container_id'    => '',
		'menu_class'      => 'menu',
		'menu_id'         => '',
		'echo'            => true,
		'fallback_cb'     => 'wp_page_menu',
		'before'          => '',
		'after'           => '',
		'link_before'     => '',
		'link_after'      => '',
		'items_wrap'      => '<ul>%3$s</ul>',
		'depth'           => 0,
		'walker'          => ''
		);

———
Is it possible to add dynamic var into “link_before/after” in wp_nav_menu?
Or I need to make it happen by other measures? thanks a lot. gratitude for any attentions and helps.