Developers write not only code but documentation, bug reports, commit messages. As a non-native English speaker, I always find myself using Hemingway App, Grammarly, and other similar tools. They help but it is quite annoying having to switch back and forth from my editor to these tools.
The good news is that Vim ships with a spell-checker. It can check for words that do not exist, wrong capitalization, and even words that were spelled wrong for the selected region.
To turn the spell-checking on, you can use this command:
:setlocal spell spelllang=en_us
You can also hook it to a specific file type, for example:
" this goes into your init.vim/.vimrc file autocmd FileType gitcommit setlocal spell