Install aspell-de by entering the following commands in the terminal:
sudo apt update sudo apt install aspell-de
Description:
German dictionary for aspell
This package contains German dictionaries for the aspell spell checker. . Dictionaries included are: de_DE (de/deutsch/german), de_CH (swiss), and de_AT, all using the new German orthography from 1996 (neue Rechtschreibung). . The old (1901) spelling is provided by aspell-de-alt.
Homepage: https://www.j3e.de/ispell/igerman98/
Version: 20161207-4
Section: universe/text