sogar mit Overleaf, was ist da los?
\documentclass[parskip=half]{scrbook} \usepackage[utf8]{inputenc} \usepackage[T1]{fontenc} \usepackage{lmodern} \usepackage[british, american]{babel} \begin{document} \hsize=3mm american: \hspace{0pt} permanent result comparability nevertheless between \selectlanguage{british} british: \hspace{0pt} permanent result comparability nevertheless between \end{document}