In this post, I want to talk about how to enable built-in spell check in Nvim.

# Enable spell check

First we need to add the spell check languages:

" spell languages
set spelllang=en,cjk

In the above config, we set the spell languages to en and cjk. The cjk language is used to prevent the CJK characters from being marked as spell errors. This is documented in the Nvim doc:

If the name “cjk” is included, East Asian characters are excluded from spell checking. This is useful when editing text that also has Asian words.

To enable spell check, just add set spell in your configuration file. Since I do not want to use spell check feature all the time, I set up a toggle for this option in normal and insert mode:

nnoremap <silent> <F11> :set spell!<cr>
inoremap <silent> <F11> <C-O>:set spell!<cr>

So we can press F11 to toggle spell checking.

# Correcting spell errors in insert or normal mode

In insert mode, if you have type some word which Vim thinks is spelled wrongly, a curly underline is shown below the word. To correct the error, you can press <C-x> followed s. A completion menu will show a list of suggestions. You can then choose the correct one.

In normal mode, to navigate between the possible spell errors, use the following shortcut key:

• [s: go to previous spell error
• ]s: go to next spell error

To correct the error, use z=. A list of candidate words will be shown. You are prompted to enter a number to select the correct word. Or you can use 1z= to directly choose the first candidate.