Install geany-plugin-spellcheck by entering the following commands in the terminal:
sudo apt update sudo apt install geany-plugin-spellcheck
Description:
spellcheck plugin for Geany
Spellcheck is a plugin which checks the content of the current document in Geany with the spell check library Enchant. This plugin allows the whole document, or only a selection to be checked for spelling mistakes. Misspelt words are highlighted with a red squiggly underline, and wrong words are printed in Geany's messages window along with available suggestions. . Geany is a small and lightweight integrated development environment using the Gtk+ toolkit.
Homepage: http://plugins.geany.org
Version: 1.32+dfsg-3
Section: universe/devel