@ronnqvist: Not every user input is saved as variables. After configuring everything go to phpmyadmin, view the table variables, order by name and show 500 records. Around 300 entries starting with "uc_" are the Ubercart variables. Alternatively you can find this list also at i18n Support (still totally experimental, does the same like the above patch for settings.php - maybe a little too complete atm).

Not variables are e.g. Attributes, Attribute Options & Shipping Labels... IMO we could solve this stuff through some module which copies the way i18n solves variables.