Related feature request: Glossary / dictionary for SE sites
I just got my invitation to the Bicycles private beta, and I realized that what I already thought would be going to be a problem really is one: Domain-specific english vocabulary is a serious obstacle for foreigners.
In programming, this is not a problem. Wherever in the world you live, you will be working with english-language resources, programming languages and expressions from day one. Whichever language you speak, you know what a browser is, what a control structure is, what an object is. No problem.
But in other areas like DIY tools, collecting stamps, or bicycles? Not so.
I think I'm fairly apt at english, but 25% of the questions I currently see on Bicycling's front page, I fail to understand because of missing vocabulary. What is a Goathead? What is a Schrader Rim? What is a Derailleur? Those words have german equivalents that I will understand in a second, but at the moment, I'd have to go check Wikipedia or Google Images. I have zero inclination to do that to be honest. It's too cumbersome.
If these sites are supposed to take off outside the english-speaking world, I think they need a glossary of some sort.
My ideal vision would be a grid-style multi-language glossary, with the english word in the first column, containing a photograph of the item where possible, and translations in (the most popular / all / all we can get) languages. Ideally community-contributed - users fill the dictionary as the site grows as @Peter Ajtai says in his comment - and with upvotes, downvotes, gaining reputation for translations and everything.
I'm fairly sure this applies to a lot of the Stack Exchange sites currently launching.
Update: this could maybe be done using the classical question/answer format in some way, e.g. with the term being a question, and the answers providing the translation in several languages. A specifically fitted format would be way better, though, and probably worth the effort.