Install hunspell-fr-classical by entering the following commands in the terminal:
sudo apt update sudo apt install hunspell-fr-classical
Description:
French dictionary for hunspell (classical version)
This dictionary is a superset of the "modern" dictionary (from the hunspell-fr-modern package), to which it adds alternative spellings (some which are still widely used, some others which are being phased out). . For an overview of the available French dictionaries, see the description of the hunspell-fr package.
Homepage: http://www.dicollecte.org/
Version: 1:6.2-1
Section: text