As reported in TracTrac Trac is the place where contributors create issues for bugs or feature requests much like GitHub.https://core.trac.wordpress.org/. ticket #24694, the Italian 3.5.2 package fails on install.
Looks like the Italian team used revision 24493 to build the package, which does not include two latest fixes: [24495] and [24498]. The lack of the latter fix causes a fatal error due to undefined function.
Please rebuild the package using revision 24499 instead.