Il suffit de recourir au package `footmisc` chargé avec l'option `multiple` :
\documentclass[12pt, a5paper, italian, german, BCOR = 0pt, DIV = 15]{scrartcl}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[light, oldstyle, largesmallcaps]{kpfonts}
\usepackage[multiple]{footmisc}
\usepackage{babel}
\begin{document}
\thispagestyle{empty}
Minestrone\footnote{nota}\footnote{notte}
Saumagen\footnote{Notiz}\footnote{Nacht}
\end{document}