I usually choose English as an installation language since I believe that the original is better than the translation. However, the environment I'm working in is mostly Russian, so I have to deal with locale specificity.

Even worse is the fact that selecting English yields to royal measurement system, that is, feet, inches, and damned letter paper size. Whatever I do, I didn't manage to get rid of letter paper size - eventually here and there I stumble upon letter as a hidden default, and that spoils my prints.

How can I select and use English as my language, but use metric system everywhere and a4 paper size everywhere, and Russian regional settings (date, time, decimal etc).