You cannot choose a language in the Pro maps wizard, but you can edit it after to change the language to Italian.
After adding a map to the page, a script tag will be added to connect to the google API:
<script type="text/javascript" src="http://maps.google.com/maps?file=api&v=2&key=<your API key>">/*wagmp*/</script>
you can add an additional parameter to the query string to set the language:
hl=it
so the script tag will be changed to:
<script type="text/javascript" src="http://maps.google.com/maps?file=api&v=2&key=<your API key>&hl=it">/*wagmp*/</script>