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%$Lamed
\documentclass{article}
\usepackage{bookman}
%\tracingmacros2
%\tracingcommands2
\usepackage[charset = isolat1, english, usenglish, russian, spanish]{mem}
\languageproperties{russian}{rmfamily = omlgc}
%\scriptproperties{Cy}{rmfamily = omlgc}
% ======
% This is an example showing how new components for new
% tasks can be added on the fly. (It's self-explanatory.)
\languageunset
\DeclareLanguageComponent{spelling}
\SetDialect{usenglish}
\DeclareLanguageCommand{\colxr}{spelling}{color}
\SetDialect{english}
\DeclareLanguageCommand{\colxr}{spelling}{colour}
\SetLanguage{spanish}
\AddLanguageProcess{text}{percent}
\SetLanguageProcess{percent}{}
\languagereset
% ======
\sloppy
\parindent0pt
\parskip4pt
\ini{documento}
\ndicegeneral
\seccin{Dates and dialects}
\hoy. Era en espaol. Pero algo en ingls: \englishtext{The very
\arabicth{day} of next month and \hoy\dots} and in American
\usenglishtext{\hoy}. Two spellings (with a macro with different
definitions for \texttt{english} and \texttt{usenglish}):
\englishtext{\colxr} and \usenglishtext{\colxr} (outside:
\meaning\colxr).
\seccin{Escaping to Unicode.}
Ligatures fi \verb+fi+:
\cuadratn f in text, i escaped to Unicode:
\dcuadratn UTF-8: f\utfstring{i} \verb+f\utfstring{i}+
\dcuadratn Unicode code: f\unichar{"69} \verb+f\unichar{"69}+
\dcuadratn Unicode text: f\unitext{^^^^0069} \verb+f\unitext{^^^^0069}+
\cuadratn Now f escaped and i in text:
\dcuadratn UTF-8: \utfstring{f}i \verb+\utfstring{f}i+
\dcuadratn Unicode code: \unichar{"66}i \verb+\unichar{"66}i+
\dcuadratn Unicode text: \unitext{^^^^0066}i \verb+\unitext{^^^^0066}i+
\textbullet\cuadratn At this point, \verb+\ini{languageset}[names]{russian}+
\ini{languageset}[names]{russian}
\seccin{\normalfont\utfstring{Предисловіе}}
\chaptername.
\utfstring{Предисловіе}.
And more .....\textsection{} (Russian).
\fin{languageset}
And more .....\textsection{} (Not Russian any more: barred O,
long s, one half, three quarters, section as macro).
\seccin{Accents}
t\unichar{"0326} \verb|t\unichar{"0326}|.
\`{\b{\"{x}}} $=$ \verb|\`{\d{\"{x}}}| \cuadratn
\b{\`{\"{x}}} $=$ \verb|\d{\`{\"{x}}}| \cuadratn
\`{\"{\b{x}}} $=$ \verb|\`{\"{\d{x}}}|
W\v{} $=$ \verb|W\v{}| \cuadratn W\v{\"{u}} $=$ \verb|W\v{\"{u}}|.
\seccin{Adding processes}
Percent in Spanish: 100\% [\%] (\verb+100\% [\%]+).
\textbullet\cuadratn In the preamble:
\begin{verbatim}
\SetLanguage{spanish}
\AddLanguageProcess{text}{percent}
\SetLanguageProcess{percent}{}
\end{verbatim}
\textbullet\cuadratn And at this point: \verb+\SetLanguageProcess{percent}{sppcent}+ (with
\verb+\SelectProcesses+)
\SetLanguageProcess{percent}{sppcent}
\SelectProcesses
Again: 100\% [\%] (\verb+100\% [\%]+, as before; note
the thin space between the number and the sign, and only at this place.)
The only expression in \texttt{sppcent} is
\begin{verbatim}
(`0'-`9')@"E125 => \1 "\kern.25em " \2;
\end{verbatim}
\end{documento}
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