Columbia subject headings:
Harvard subject headings:
German language--Middle High German, 1050-1500--History.
German language--Spoken German.
Speech acts (Linguistics)--History--19th century.
Speech--History--19th century.
Princeton subject headings:
German language--Dialects--History--19th century.
German language--Spoken German.
German language--Standardization--History--19th century.
German language--Variation--History--19th century.
Oral communication--Standards--Germany--History.
Speech acts (Linguistics)--History--19th century.
Speech--History--19th century.