How many unofficial languages are used in Italy?
unofficial languages refers to IsOfficial = 'F'; Italy is a name of country;
SELECT SUM(CASE WHEN T2.IsOfficial = 'F' THEN 1 ELSE 0 END) FROM Country AS T1 INNER JOIN CountryLanguage AS T2 ON T1.Code = T2.CountryCode WHERE T1.Name = 'Italy'