Spell Check can be turned on with a shortcut, but it can’t be turned off with a shortcut. In the list of shortcuts there is "Run Spell Check". It would be good if it would be replaced by something like this: "Spell Check on/off", so one can toggle Spell Check on/off with just one shortcut.
Steps to reproduce Use Geany without toolbar. Try to turn spell check on and off with a shortcut.
Actual result Spell check can be turned on with a shortcut but it can’t be turned off with a shortcut.
Comparison In LibreOffice 7.1.3.2 "Automatic Spell Checking" can be turned on and off with the same shortcut (Shift+F7).