If you have Casual EditKit installed then access to the Transient casual-ispell-tmenu is available from casual-editkit-main-tmenu.
casual-ispell-tmenu can also be bound to a mode of preference. Shown below is a recommended configuration to use in an initialization file.
(keymap-set prog-mode-map "C-c s" #'casual-ispell-tmenu) (keymap-set text-mode-map "C-c s" #'casual-ispell-tmenu) (keymap-set bibtex-mode-map "C-c s" #'casual-ispell-tmenu) (keymap-set conf-mode-map "C-c s" #'casual-ispell-tmenu)