%%%
% Ecriture des nombres en lettres
%%%
\setKVdefault[ClesEcriture]{Math=false,Majuscule=false,E=false,Tradition=false,Zero=false}

\newcommand\EcriturePluriel[1]{%
  \xintifboolexpr{#1 > 1}{s}{}%
}

\newcommand\EcritureDecimale{%
  \StrLen{\ListeEcriture[2]}[\LongueurDecimale]%
  \xintifboolexpr{\LongueurDecimale == 6}{%
    ~millionième\EcriturePluriel{\ListeEcriture[2]}%
  }{\xintifboolexpr{\LongueurDecimale == 5}{%
     ~cent-millième\EcriturePluriel{\ListeEcriture[2]}
    }{\xintifboolexpr{\LongueurDecimale == 4}{%
        ~dix-millième\EcriturePluriel{\ListeEcriture[2]}
      }{\xintifboolexpr{\LongueurDecimale == 3}{%
          ~millième\EcriturePluriel{\ListeEcriture[2]}
        }{\xintifboolexpr{\LongueurDecimale == 2}{%
            ~centième\EcriturePluriel{\ListeEcriture[2]}
          }{\xintifboolexpr{\LongueurDecimale == 1}{%
              ~dixième\EcriturePluriel{\ListeEcriture[2]}
            }{}%
          }%
        }%
      }%
    }%
  }%
}%

\newcommand\Ecriture[2][]{%
  \useKVdefault[ClesEcriture]%
  \setKV[ClesEcriture]{#1}%
  \ifboolKV[ClesEcriture]{Tradition}{%
    \fmtcountsetoptions{french={dash or space=traditional}}%
  }{%
    \fmtcountsetoptions{french={dash or space=always}}%
  }%
  \setsepchar{.}%
  \readlist*\ListeEcriture{#2}%
  \xintifboolexpr{\ListeEcriturelen == 2}{%
    \ifboolKV[ClesEcriture]{Majuscule}{%
      \ifboolKV[ClesEcriture]{Zero}{}{\Numberstringnum{\ListeEcriture[1]}}\ifboolKV[ClesEcriture]{Math}{\ifboolKV[ClesEcriture]{Zero}{}{\ifboolKV[ClesEcriture]{E}{e}{}~unité\EcriturePluriel{\ListeEcriture[1]} et }}{\ifboolKV[ClesEcriture]{Tradition}{ virgule }{-virgule-}}\numberstringnum{\ListeEcriture[2]}\ifboolKV[ClesEcriture]{Math}{\EcritureDecimale}{}%
    }{%
      \ifboolKV[ClesEcriture]{Zero}{}{\numberstringnum{\ListeEcriture[1]}}\ifboolKV[ClesEcriture]{Math}{\ifboolKV[ClesEcriture]{Zero}{}{\ifboolKV[ClesEcriture]{E}{e}{}~unité\EcriturePluriel{\ListeEcriture[1]} et }}{\ifboolKV[ClesEcriture]{Tradition}{ virgule }{-virgule-}}\numberstringnum{\ListeEcriture[2]}\ifboolKV[ClesEcriture]{Math}{\EcritureDecimale}{}%
    }}{%
    \ifboolKV[ClesEcriture]{Majuscule}{%
      \Numberstringnum{\ListeEcriture[1]}\ifboolKV[ClesEcriture]{Math}{\ifboolKV[ClesEcriture]{E}{e}{}~unité\EcriturePluriel{\ListeEcriture[1]}}{}%
    }{%
      \numberstringnum{\ListeEcriture[1]}\ifboolKV[ClesEcriture]{Math}{\ifboolKV[ClesEcriture]{E}{e}{}~unité\EcriturePluriel{\ListeEcriture[1]}}{}%
    }%
  }%
}%