Columbia subject headings:
German language--Orthography and spelling.
German language--Standardization.
German language--Written German.
Harvard subject headings:
German language--Early modern, 1500-1700--Writing.
German language--Middle High German, 1050-1500--Writing.
German language--Writing--History.
Historical linguistics--Germany.
Linguistic change--Germany--History.
Princeton subject headings:
German language--Orthography and spelling.
German language--Standardization.
German language--Written German.