in the map v3 API, it no longer uses the hl attribute, it now uses the language attribute.
change:
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&hl=de&key=">/*wagmp*/</script>
to:
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&language=de&key=">/*wagmp*/</script>