Theme function.php parameter

I put the code below in the child theme.

add_filter( 'um_localize_permalink_filter', 'my_localize_permalink', 10, 2 );
function my_localize_permalink( $link, $user ) {
	// your code here
	return '/user/'.$user->user_nicename.'';
}

I want to add WPML parameters at the very end of the return value.
Does anyone know the code?