Hey fellow italian mate, I'm pretty sure GEC (Giochi Elettronici Competitivi), the italian association affiliated with CONI about e-sports through ASI, is going to cover worlds with their own shoutcast that is supported in an unofficial way from Italian rioters like Judge and others since they yet cover LCS with their shoutcast/analyst desk made by some of the Italian players which are among the highest in the standings
I don't think Riot will ever do official shoutcast for Italy since there is a pretty small market they can cover up speaking Italian - they are often not doing official shoutcast also for much more spoken languages like Spanish or German -, but GEC generally do a more than adequate work if you don't want to listen to the English shoutcast
By the way, I think it would have been more appropriate to raise the question in EUW English Forum or in the Italian forum and ask directly to someone more informed about Riot plans like Judge or other italian rioters ;D