\documentclass[a4paper]{article}
\usepackage{lmodern}
\usepackage{amssymb,amsmath}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage{hyperref}
\usepackage[autostyle=true]{csquotes}
\begin{document}
\thispagestyle{empty}
\parbox{.5\linewidth}{
\enquote{Ein \enquote{verschachteltes} Zitat.}\\\\
\foreignquote{english}{An English quote.}
}
\end{document}