Package polyglossia Warning: No hyphenation patterns were loaded for `Italian'
(polyglossia) I will use language=l@nohyphenation instead on in
put line 9.

Package polyglossia Warning: setlocalhyphenmin useless for unhyphenated languag
e italian on input line 9.

% !Mode:: "TeX:UTF-8"
%
documentclass[a4paper,12pt]{book}

usepackage{polyglossia}

setmainlanguage{italian}
setmainfont{Linux Libertine O}

begin{document}
Lorem ipsum dolor sit amet, consectetur adipisci elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua.
end{document}

Cannot get a temporary directory after five iterations ... sorry! at e:texlive2015texmf-distscriptstexlivefmtutil.pl line 334.