How to rename chapters in Table Of Content in French document?

Question

My document is in French. I added appendices to the document, appendices use \chapter{}, hence I would like that these chapters to be names "Annexe" (which is the French word for "Appendice" in table of content.

But I my current document I don't manage to do that.

I expect it has to do with the cutomization of my table of content. Which I want to keep as well.

working example:

%Preamble
\documentclass[a4paper,french,oneside,openright]{book}
\usepackage[french]{babel}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
    filecolor=magenta,

    urlcolor=cyan
}
\usepackage{lastpage}
\usepackage{lipsum}
\usepackage{tocloft,calc}
\renewcommand{\cftchappresnum}{Chapitre }
\AtBeginDocument{\addtolength\cftchapnumwidth{\widthof{\bfseries Chapitre }}}
\usepackage{datetime}
\usepackage[toc]{appendix}
\begin{document}
\tableofcontents


\part{main}
    \chapter{Lorem ipsum}
    \lipsum[1-2]
\renewcommand{\appendixname}{Annexe}
\renewcommand{\appendixtocname}{Annexe}
\renewcommand{\appendixpagename}{Annexe}
\part{appendices}
\begin{appendices}
    \chapter{Some appendice}
    \lipsum[1-2]
    \chapter{Some appendice}
    \lipsum[1-2]
\end{appendices}
\end{document}

---

I know that this question has been closed and pointing to \chaptername is used even for appendix chapters in ToC but that didn't help me at all. Another answer is marked as solutions under this question. That one helped me solve the issue.

Answer 1

You have to tell LaTeX that when processing the appendices in the TOC, \chaptername should become \appendixname.

The setting will disappear as soon as the TOC has been typeset, because this happens inside a group.

\documentclass[a4paper,french,oneside,openright]{book}
\usepackage[T1]{fontenc}
\usepackage[french]{babel}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
    filecolor=magenta,

    urlcolor=cyan
}
\usepackage{lastpage}
\usepackage{lipsum}
\usepackage{tocloft,calc}
\usepackage{datetime}
\usepackage[toc]{appendix}
\renewcommand{\cftchappresnum}{\chaptername\ }
\AtBeginDocument{\addtolength\cftchapnumwidth{\widthof{\bfseries\chaptername }}}
\AddToHook{env/appendices/begin}{%
  \addtocontents{toc}{\let\string\chaptername\string\appendixname}%
}
\begin{document}
\tableofcontents
\part{main}
\chapter{Lorem ipsum}
\lipsum[1-2]
\part{appendices}
\begin{appendices}
\chapter{Some appendice}
\lipsum[1-2]
\chapter{Some appendice}
\lipsum[1-2]
\end{appendices}
\end{document}

Answer 2

You can tweak the \addcontentsline macro as it is done in the appendix package (when using the titletoc option).

\documentclass[a4paper,french,oneside,openright]{book}
\usepackage{lastpage}
\usepackage{lipsum}
\usepackage{tocloft,calc}
% a command to tweak \addcontentsline for chapters
\newcommand{\chapitretocentry}{%
    \let\oldacl=\addcontentsline % save original definition
    \def\addcontentsline##1##2##3{% (re)define \addcontentsline
        \def\tempa{##1}\def\tempb{toc}% store ##1 and toc in temp vars
        \ifx\tempa\tempb % check if they are "equal"
            \def\tempa{##2}\def\tempb{chapter}%
            \ifx\tempa\tempb % check if ##2 is "equal" to chapter
                \oldacl{##1}{##2}{\chaptername\space ##3}% apply original \addcontentsline adding \chaptername
% in the other cases, just apply the original \addcontentsline
            \else
                \oldacl{##1}{##2}{##3}%
            \fi
        \else
            \oldacl{##1}{##2}{##3}%
        \fi
    }
}
\AtBeginDocument{\chapitretocentry} % invoke the command at the beginning
\usepackage{datetime}
\usepackage[titletoc]{appendix}
\usepackage[french]{babel}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
    filecolor=magenta,

    urlcolor=cyan
}
\begin{document}
\tableofcontents

\part{main}
\chapter{Lorem ipsum}
\lipsum[1-2]


\renewcommand{\appendixname}{Annexe}
\renewcommand{\appendixtocname}{Annexes}
\renewcommand{\appendixpagename}{Annexe}

\part{Annexes}
\let\addcontentsline=\oldacl % reset the original def
\begin{appendices}
    \chapter{Some appendice}
    \lipsum[1-2]
    \chapter{Some appendice}
    \lipsum[1-2]
\end{appendices}


\end{document}