Package descriptions are translated by the DDTP volunteers. Mainly they use the web GUI at [1].
I' ve pulled it in [2]. Now it needs a review to proceed to the database and finally to Translation-de.bz2 under [3]. It will take up two weeks then. In total three reviews are needed. One review is equivalent to one week without change. 1: http://ddtp2.debian.net/ddtss/index.cgi/xx 2: http://ddtp2.debian.net/ddtss/index.cgi/de/forreview/aeolus?1515537014 3: http://ftp.debian.de/debian/dists/sid/main/i18n/