\usepackage{fontspec}

\newfontfamily\AltFont[Mapping=tex-text]{Linux Libertine O}
\newfontfamily\CaviarDreamsFont[Path=../fonts/, Mapping=tex-text]{CaviarDreams}
\newfontfamily\CaviarDreamsBoldFont[Path=../fonts/, Mapping=tex-text]{CaviarDreams_Bold}
\newfontfamily\BeatrixFont[Path=../fonts/,Mapping=tex-text]{Beatrix}

\defaultfontfeatures{Ligatures={Common, Required, Contextual}}
\setmainfont{EB Garamond}

% Change the font for bold text
\let\bf\textbf
\renewcommand{\textbf}[1]{{\AltFont\selectfont\bf{#1}}}

\setmonofont{Latin Modern Mono Light}