this is not the best way but …
You can modify the class-public.php in includes folder of the plugin.
near of 200 line you can replace this:
<?php echo $content; ?>
By this:
<?php
$current_lang = $GLOBALS[‘q_config’][‘language’];
if ($current_lang==”ca”){
echo “catala”;
}
else if($current_lang==”es”){
echo “espa?ol”;
}
?>
(modify to adapt to your languages !! )
??