I'm seeking the document which mentions the names of chemical elements in German. Some of them were changed in the past (e.g. Jod to Iod for iodine). IUPAC defines the standard name of elements for English but not for German. I searched the German Chemical Society's (Gesellschaft Deutscher Chemiker) homepages, but can't find such document. Is there such a document? Are the names unified among Germany, Austria and Switzerland?
I'm East Asian, and I searched official terminologies for relatively developed East Asian countries: People's Republic of China, Republic of China, Japan and South Korea. The four countries has official document about the name of all elements in their national chemistry society. Such names are used in educations and their laws. Therefore, on a national level, different local names may cause confusion and people need official names.
For example, the law of Germany uses German IUPAC name: BtMG Anlage I - Betäubungsmittelgesetz (BtMG). So someone needs to define German IUPAC name.
According to Wikipedia — Nomenklatur (Chemie):
So ist im deutschsprachigen Raum der Deutsche Zentralausschuss für Chemie unter Geschäftsführung der Gesellschaft Deutscher Chemiker (GDCh) im Einvernehmen mit den nationalen IUPAC-Mitgliedsgesellschaften der Schweiz und Österreich für die Umsetzung zuständig.
Thus the representative of the German IUPAC nomenclature is DZfCh or GDCh.