Hi Paul,
All needed .js seems to be there, but in your index.php file, there is
a Js block missing, just before line </head>
Then, add this block for daynames translation:
<script type="text/javascript">
var dayname = new Array('<?php echo $Tr_sun."', '".$Tr_mon."', '".$Tr_tue."', '".$Tr_wed."', '".$Tr_thu."', '".$Tr_fri."', '".$Tr_sat."', '".$Tr_sun; ?>');
</script>
Hope this help,
Cheers,
Jacques