Their system appears to be similar to Russian Wikipedia's (see T184967). Only quality assessments, no apparent system of importance ratings or WikiProjects.
I have broken down the rating system to at least three types:
- Exzellente Artikel (equivalent to featured status), template: Vorlage:Exzellent
- Lesenswerte Artikel (good article, I think), template: Vorlage:Lesenswert
- Informative Listen und Portale (featured lists and portals), template: Vorlage:Informativ
Just as with ruwiki, I think for this to work we'd need to pass in the article title to each template, and each template should transclude a meta template that contains the necessary parser function.