Turn Vim Spell On:
:set spell
You should now see miss-spelled words underlined.
Correcting Words:
Recommend Correct Spelling (while cursor is on word):
z=
Add word to dictionary:
zg
Remove word from dictionary:
zw
Navigating:
Move to left miss-spelled word:
[s
Move to right miss-spelled word:
]s
To turn off spellchecker:
:set nospell
To Learn More!
https://neovim.io/doc/user/spell.html