Just discovered TeX few days ago :)
Experimenting a lot now. I am trying to make a template for my thesis (which is going to use quotations and bibliography in a good few languages and some serious math too). XeLaTeX seems to be giving me least problems now (but it was tough at the beginning).
Anyways, I am a bit confused about this missing space between month name and the year in the date for the Polish version of it...
Am I doing something wrong or is there a bug?
%!TEX TS-program = XeLaTeX
%!TEX encoding = UTF-8 Unicode
\documentclass{minimal}
\usepackage[no-math]{fontspec}
\newfontfamily\greekfont[Script=Greek, Scale=MatchUppercase, Ligatures=TeX]{Linux Libertine O}
\newfontfamily\cyrillicfont{Linux Libertine O}
\usepackage{polyglossia}
\setdefaultlanguage[variant=british]{english}
\setotherlanguages{latin,greek,russian,polish,german}
\begin{document}
greek (\textgreek[variant=ancient]{ελληνικά \today}),
russian (\textrussian{русский \today}),
polish (\textpolish{polski \today}),
german (\textgerman{Deutsch \today}),
latin (\textlatin{Latina \today}),
\end{document}

minimal; see Why not use the minimal class. – doncherry Apr 02 '13 at 01:20