geany 1.33 (built on 2018-03-06 with GTK 3.22.28, GLib 2.54.3) geany-plugins 1.33-1 aspell 0.60.6.1-5 hunspell 1.6.2-1 hunspell-en 2017.01.22-2 hunspell-en_US 2017.01.22-2 linux 4.15.8-1-ARCH
After a full system update, the Spellcheck plugin is no longer in the Plugin Manager dialog.