Dear everyone,

I am writting a French document.
I would like to turn off the French character spacing temporarily in order to
typeset English document title or URL. For instance, I would like to define the commands

\def\englishtitle#1{\turnofffrenchcharacterspacing{\em #1}\turnonfrenchcharacterspacing}
\def\url#1{\turnofffrenchcharacterspacing{\em #1}\turnonfrenchcharacterspacing}

so that a title link “Example: English Title” will be italicised and will not have a space before “:”;
and a URL like “http://www.example.com” neither.

Many thanks,
Joas