Install iswiss by entering the following commands in the terminal:
sudo apt update sudo apt install iswiss
Description:
Swiss (German) orthography dictionary for ispell
This is a dictionary for ispell for the new German orthography (de-CH-1996), which is used since 1998-08-01 and which is obligatory as of 2005-08-01. . It is based on the famous hkgerman dictionary (using the old German orthography, which is available as iogerman), with many corrections and additions. . This particular rendering supports swiss spelling. This includes some Swiss words, as well as ss instead of German sz ligature.
Homepage: https://www.j3e.de/ispell/igerman98/
Version: 20161207-4
Section: universe/text