+%%% Localization %%%
+
+% Current language
+\def\localelang{en}
+
+% Define a new localized string: \localedef{language}{identifier}{message}
+\def\localedef#1#2{\expandafter\def\csname loc:#1:#2\endcsname}
+
+% Expand a localized string in the current language: \localemsg{identifier}
+\def\localestr#1{%
+ \ifcsname loc:\localelang:#1\endcsname
+ \csname loc:\localelang:#1\endcsname
+ \else
+ \ucwwarn{Localized string #1 not defined in language \localelang}%
+ ???%
+ \fi
+}
+
+%%% Modules %%%
+
+\def\ucwmodule#1{
+ \ifcsname ucwmod:#1\endcsname
+ \else
+ \input ucw-#1.tex
+ \fi
+}
+
+\def\ucwdefmodule#1{
+ \ifcsname ucwmod:#1\endcsname\endinput\fi
+ \expandafter\let\csname ucwmod:#1\endcsname=\relax
+}
+