A fix for nLingual to ensure localized URLs have any extras on the end preserved.

nlingual-localize_here-fix.php

<?php
/*
Plugin Name: nLingual localize_here() fix
Description: A fix for nLingual to ensure localized URLs have any extras on the end preserved.
Version: 1.0.0
Author: Doug Wollison
Author URI: http://dougw.me
License: GPL2
*/

function nlingual_localize_here_with_postfix( $url ) {
	// If the localized URL starts the same as the original but with possible tailing additions, revert to the original
	if ( strpos( NL_ORIGINAL_URL, $url ) === 0 ) {
		$url = NL_ORIGINAL_URL;
	}

	return $url;
}
add_filter( 'nlingual_localize_here', 'nlingual_localize_here_with_postfix', 10, 1 );