%%
%% The LaTeX Companion, 3ed
%%
%% Example 13-3-29 on page II-322 in "Layout considerations".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.0pt}

%StartShownPreambleCommands
\usepackage[french,english]{babel}
\frenchsetup{AutoSpaceFootnotes,FrenchFootnotes}
%StopShownPreambleCommands

\begin{document}
\begin{minipage}{70pt} Some text\footnote{with a footnote}.
\end{minipage}
\selectlanguage{french}\StandardFootnotes
\begin{minipage}{70pt} Some text\footnote{with a footnote}.
\end{minipage}
\end{document}