\documentclass{article}
\usepackage{fontspec}
\setmainfont[Mapping=tex-text]{Linux Libertine O}
\setsansfont[Mapping=tex-text,Scale=0.75]{Linux Biolinum O}
\setmonofont{Linux Biolinum O}
\usepackage{xunicode}
\usepackage{polyglossia}
\setdefaultlanguage[variant=british, ordinalmonthday = false]{english}
\setotherlanguage{albanian}
\setotherlanguage[variant=polytonic]{greek}
\setotherlanguage{hebrew}
\begin{document}

\part{df}

1 English \textgreek[variant=ancient]{ancient Greek} English
\textgreek[numerals=arabic, variant=ancient]{ancient G\textsf{reek} with Arabic numerals} English

\begin{albanian}%

\part{df}

2 Albanian \textgreek{Greek} Albanian \textsc{smallcaps}

\end{albanian}%
\begin{hebrew}%

\part{df}

3 Hebrew

\end{hebrew}%

%empty language paragraph
\begin{albanian}%
\end{albanian}%

\end{document}
