I worked a bit more on the i18n stuff in django today and finally switched my gallery to the i18n branch. You can now see the strings on that site with either english or german settings. Other languages get english output (so if you are in Germany and still see english strings - check the language settings in your browser, wether German is defined with higher priority than English).
The code works quite nice and I think I will give it a week or so to settle and than start to put finishing touches to it - like adding much more translation hooks to the django source.