Babel 不再编译土耳其语

Question

哪些地方有误或缺失

\documentclass[a4paper,12pt]{article}
\usepackage{fontspec}
\usepackage[turkish,italian]{babel}
\babelfont[italian]{rm}[Ligatures=TeX,Numbers={Proportional,OldStyle}]{EB Garamond}
\babelfont[turkish]{rm}[Ligatures=TeX,Numbers={Proportional,OldStyle}]{EB Garamond}

\begin{document}

\selectlanguage{italian}

Quel ramo del lago di Como

\end{document}

为了：

! Missing \endcsname inserted.
<to be read again> 
\let 
l.7 \begin{document}

谢谢

多发性硬化症