Fix call to \frontmatter

main.tex

@@ -81,11 +81,11 @@
 %% Document
 \begin{document}
 
+\frontmatter
 \selectlanguage{french}
 \input{00-cover/cover}
 \selectlanguage{english}
 
-\frontmatter
 \inputchapter{01-front/acknowledgement}
 \inputchapter{01-front/abstract}
 \inputchapter{01-front/résumé}