\documentclass[10pt]{ETSletter}
% \documentclass[10pt,english]{ETSletter} % Puts the date, footer and header in English
\usepackage[T1]{fontenc}
\usepackage{lipsum}
% Uncomment this line if you don't want page numbering
%\pagenumbering{gobble}
% As per ETS guidelines, phone number and department are shown
% after the address, below the logo. Change it to something that
% makes sense to your
\def\ETSphone{+1 514 396-8802}
\def\ETSdepartment{Direction générale}
\def\name{Aldus Dumbledore} % Your name here
% Optional subject line
\subject{L'insupportable métamorphose}
% You can create your signature here
\signature{\raggedright
\includegraphics[scale=0.2]{figs/dumbledores_signature.png}\\
\name
}
% If use want to have a bilingual version of any content, use the \bilingual command
% Example: \bilingual{Headmaster of Hogwarts}{Directeur de Poudlard}
\address{\textbf{\bilingual{Headmaster of Hogwarts}{Directeur de Poudlard}\\
Président du Magenmagot\\
Fondateur de l'ordre du Phénix}\\
École de magie et de sorcellerie de Poudlard\\
Highlands, Écosse, Royaume-Uni\\
}
\begin{document}
\begin{letter}{
Professeure Minerva McGonagall\\
École de magie et de sorcellerie de Poudlard\\
Highlands, Écosse, Royaume-Uni\\
}
\opening{Chère Professeure McGonagall,}
\lipsum[1-10]
\closing{Bien cordialement,}
\end{letter}
\end{document}