transliteration charset independent?

[Bruno Haible]

Hi Ulrich,

I can see that transliteration can be given in a locale file, using
the ISO 14652 draft format. But how can it be charset independent
then?

What I'd like to have is an en_US locale with

  - no transliteration if it's en_US.UTF-8,

  - transliteration of U+201C to U+0060 U+0060
                   and U+201D to U+00B4 U+00B4
    if it's en_US.ISO-8859-1,

  - transliteration of U+201C to U+0022
                   and U+201D to U+0022
    if it's en_US.ANSI_X3.4-1968.

Is it possible to have this?

Bruno