\setmainfont{Linux Libertine O}
\setsansfont{Linux Libertine O}

\newfontfamily\greekfonttt[
	Script=Default,
	Scale=MatchLowercase,
	Path = assets/fonts/,
	Extension = .ttf,
	UprightFont = *-Regular,
	BoldFont=*-Bold,
	ItalicFont=*-Italic,
	BoldItalicFont=*-BoldItalic
]{Hack}

\setdefaultlanguage{greek}
\setotherlanguage{english}