Install aspell-et by entering the following commands in the terminal:
sudo apt update sudo apt install aspell-et
Description:
Estonian dictionary for Aspell
This dictionary provides Estonian wordlists for the Aspell spellchecker currently supported by GNOME applications. . The wordlists are based on work by the Institute of the Estonian Language, and subsequently improved by Jaak Pruulmann who also created the affix file.
Homepage: http://www.meso.ee/~jjpp/speller/
Version: 1:20030606-27
Section: universe/text