이거 어떻게 쓰는 건지 잠깐 설명좀 부탁드려도 될는지요?

%% test.tex

\documentclass{minimal}

\usepackage{kotex}

\setmainhangulfont[Ligatures=TeX]{HCR Batang LVT}

\setsanshangulfont[Ligatures=TeX]{HCR Dotum LVT}

\usepackage{iftex}

\ifXeTeX

\xetexkofontregime [puncts=prevfont, hyphens=latin, colons=prevfont, cjksymbols=hangul]{latin}

\else

\fi

% \makeatletter

% \edef\reserved@a{\f@family}\edef\reserved@b{\rmdefault}%

% \ifx\reserved@a\reserved@b

  % Serif

% \else

  % Sans or Mono

% \fi

% \makeatother

\begin{document}

this is the pros and cons of hitch-hiking

이것은★ 소리없는--아우성. roaring. silence? 소리없는? 

\end{document}