% arara: pdflatex
\documentclass[american,german-at,british]{article}

\usepackage{babel}
\usepackage{animals}

\begin{document}
\selectlanguage{american}

\catname.
\dogname.
\ladybirdname.

\selectlanguage{german-at}

\catname.
\dogname.
\ladybirdname.

\selectlanguage{british}

\catname.
\dogname.
\ladybirdname.

\end{document}