Thanks to my friend Kathrin I discovered a lengthy and 4-language dictionary of applied geology published online in the free access journal Freiberg Online Geosciences. In the 2001 edition a dictionary in German, English, Spanish and French is presented that has been compiled by Freiberg hydrogeologists. Consindering that I used to study for several semesters in Freiberg it is rather embarassing that only now I come across this interesting dictionary. All 4 language versions and one index can be freely downloaded as searchable PDF-files.
Here are the direct links to the files:
I also recommend actually checking out their website. It features a number of papers on investigations of Freiberg geologists.