Noticed you don't have many responses yet. Those of us in the US may find it hard to recognize your web address in the name there, so I'm putting a link here for others to see it easier (hope you don't mind). I'm not sure it was clear that the translator page links to your page in a translated version.
http://www.nordlicht-leder.de
As for critique, the layout looks good for the most part. I will say that such linear pages like the home page are kind of hard on people's attention spans. It looks like you have things pretty well categorized on the left navigation menu, so it might be better to slim down the home page and place things in the dedicated pages for those types of items. I think the home page should be short and brief with a focus of driving people to the aspects of the page that they're interested in. One idea I was working on for mine was a front page slider for new items that linked to that items description on it's product page. That way if people are interested in your steampunk bag, they can click and go check out some more details, but if it's not their thing, they don't have to scroll past it to find the items they are interested in.
Do you mind me asking what you're using for an image/gallery plugin? I really like the way those are presented and I keep on vowing to finish my website someday.