Re: windows-1251 language environment

[Richard Stallman]

    My intention is to have something like "new" under this menu:
            <menu-bar> <options> <mule> <set-language-environment>
    When "new" is selected, Emacs put a user in a buffer in
    which he can create his own language environment
    interactively.  Typing C-c C-c should ask if he want to use
    that environment in the future session.

That seems like a good feature.  It could be implemented with
or without define-derived-language.