We translated all the strings to thw second language and we imported it. Everything in the public site is OK, but for the admin pages there is a strange behaviour.
It seems that even if we change the cauurent user locale (from US to GR) the default.aspx main categories are always in the one language. The web config is set to GR. But still can we make admin users to enter with the LOCALE the choose when they register or not?