What rules have been used for the current list of codepoints?

[Harald Alvestrand]

--On 15. desember 2006 10:35 -0800 Erik van der Poel <erikv at google.com> 
wrote:

>> but even various computer applications may not know. Today's
>> email clients don't generally know.
>
> Most email clients have a user interface in a single language. That
> would be the default language to use for IDN display. Some clients may
> even allow the user to specify multiple languages, as browsers do.

I find it very convenient that my email client displays Russian spam in 
Russian characters. I can instantly recognize that as Russian, and know 
that the sender has no interest in communicating with me.

I prefer that form of display. I may not be the only one.

              Harald