\ProvidesPackage{languages-fonts}

\usepackage{polyglossia}

\newfontfamily\greekfont[Script=Greek]{Linux Libertine O}
\newfontfamily\greekfontsf[Script=Greek]{Linux Libertine O}
\newfontfamily\greekfonttt[Script=Greek]{Linux Libertine Mono O}

\setdefaultlanguage{greek}
\setotherlanguage{english}