%%
%% The LaTeX Companion, 3ed
%%
%% Example 13-2-3 on page II-304 in "Setting or getting the current language".
%%
%% 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{177.0pt}

%StartShownPreambleCommands
\usepackage[english,ngerman,naustrian]{babel}
%StopShownPreambleCommands

\begin{document}
The current language is \texttt{naustrian},
i.e., Austrian, and its hyphenation rules
\iflanguage{ngerman}{are}{are not} the same as
for German. English has \iflanguage{english}{the
same}{different} patterns.
\end{document}