Bug#250277: Problem with selecting locale during installation

[Meghazi Fabien <agr@amigrave.com>]

> Since I want my systems to speak english I choose English (other country)
> and then told it I was in Italy... What it happened later was that
> locale failed to configure because it was searching a non-existant "en"
> locale, and that /etc/environment was left empty... :/

I had exactly the same problem. I want the system to be in english, but I've a 
belgian keyboard so I used "English (other country)" then I used Belgian 
Keyboard, and after the installation, I can't do anything because even perl 
won't runs the post and pre inst opf the debs because it reports a locale 
problem searching for "en"

> I don't know if this has been already reported or what's the component
> of d-i responsible for this, so I'm reporting it here. Sorry for
> eventual duplicate reports, unfortunately I haven't had time to
> familiarize with d-i internals yet... :(
>
> Thanks for your work, for any other thing the installations went charmly.

Did you found how to continue the installation ?
I tried dpkg-reconfigure locales but dpkg won't run because of the locale 
problem.