\documentclass{article}
\usepackage{fmtcount}
\usepackage{lipsum}
\newwrite\styfiles
\openout\styfiles=fc-styfiles.txt
\begin{document}
\immediate\write\styfiles{STYFILES=\string\^^J}
\makeatletter
{%
 \def\@tempb#1{%
   \immediate\write\styfiles{fc-#1.def\string\^^J}%
 }%
 \fc@iterate@on@languages\@tempb
}
\makeatother
\immediate\write\styfiles{fmtcount.sty fcnumparser.sty fcprefix.sty}
\closeout\styfiles
\lipsum
\clearpage
\end{document}
