\listfiles
\documentclass[a4paper,french,english]{article}
\usepackage{babel}
\usepackage{glossaries-extra}
\makeglossaries
\newabbreviation{dvd}{DVD}{Digital Video Disc}
\newabbreviation{lug}{LUG}{Linux Users Group}
\begin{document}
\begin{itemize}
\item The current language is English: \today{}.
\item But \texttt{glsxtrabbrvpluralsuffix=\glsxtrabbrvpluralsuffix}.
\item \renewcommand{\glsxtrabbrvpluralsuffix}{s}%
  Despite \verb|\renewcommand{\glsxtrabbrvpluralsuffix}{s}|
  (now \texttt{glsxtrabbrvpluralsuffix=\glsxtrabbrvpluralsuffix}), the
  shortplural forms are not followed by an `s':
  \begin{itemize}
  \item \gls{dvd}, \glspl{dvd}.
  \item \glspl{lug}, \gls{lug}.
  \end{itemize}
\end{itemize}
\printglossary
\end{document}
