\documentclass{book} \usepackage{ifxetex,ifluatex} \ifxetex \usepackage{polyglossia} \setmainlanguage{english} \usepackage{fontspec} \else\ifluatex \usepackage{polyglossia} \setmainlanguage{english} \usepackage{fontspec} \else \usepackage[english]{babel} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage{lmodern} \fi\fi \usepackage[ hashEnumerators, definitionLists, footnotes, inlineFootnotes, smartEllipses, fencedCode, contentBlocks ]{markdown} \begin{document} \markdownInput{example.md} \begin{markdown} Here are some non-ASCII characters: *ěščřžýáíé*. \end{markdown} \end{document}