Hi,

You can use: 
\setcharacterspacing[reset] 
when you don’t want the French character spacing, and 
\setcharacterspacing[frenchpunctuation]
when you want it.

For instance for the interaction you would say:
\setupinteraction[color=darkgreen,style={\setcharacterspacing[reset]\tt}]
\setupinteraction [state=start]

and for setting up the typing
\setuptype[style={\setcharacterspacing[reset]\tt}]
\setuptyping[style={\setcharacterspacing[reset]\tt}]

Best regards: OK

On 10 Apr 2015, at 11:51, joasyannick@gmail.com wrote:

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

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