Well, I can puzzle through some German and it has an English summary. But I'm still torn on whether it's "important enough" to find someone to translate it for me.
You're asking an impossible question. We don't know what your research is on, what the article is on.... Take ahstudent's advice. If it's cited frequently, you need to get it. If not, then you probably don't, but really only you can make the decision. If it's keeping you awake at night or it's going to bother you, get it so you know one way or another. If it isn't, see if it's cited elsewhere, and if not, leave it.