How to apply \usepackage[french]{babel} to marginnote in a tufte-book document

Question

I use the {tufte-book}documentclass and I write my document in french language with usepackage[french]{babel}. Unfortunatly the margin notes and the bibliography references remains in english, as well as the formatting of the legends of the figures and tables. Does anybody could help me to apply the french langage on all the document ?

\documentclass[symmetric,justified,marginals=raggedouter]{tufte-book}
\usepackage{microtype}
\usepackage{fancyvrb}
\usepackage[utf8] {inputenc}
\usepackage[T1]{fontenc}
\usepackage[french]{babel}

\begin{document}

\bibliographystyle{plainnat}
\bibliography{sample-handout}

\end{document}

This is an example of the problem above. You can see in the fourth note that there is a "and" in place of "et" and the word "edition" in place of "édition" :

Answer 1

I found a solution !! I have to use the bibliographystyle{plain-fr}