What I and many other want to be able to do :
- create a site in (any language but english)
- allows users (especially the admin user in my case) to select english (or another language) in their user account and then VIEW THE SITE IN THEIR CHOSEN LANGUAGE.
It's very simple, it was like that in Drupal 5, why change it?
At the moment, when a user select english as their language, I've learned from the mentionned thread, that only occasional emails are sent in this language. I think what everyone wants is to allow users to see all drupal standard texts and modules texts in their selected language!
Personnally I want that in order to be able to admin the site in english even if the site is french for visitors.