mkdir -p ~/.vim/spell
cd ~/.vim/spell
wget --no-check-certificate https://ftp.vim.org/vim/runtime/spell/es.latin1.spl
wget --no-check-certificate https://ftp.vim.org/vim/runtime/spell/es.latin1.sug
wget --no-check-certificate https://ftp.vim.org/vim/runtime/spell/es.utf-8.spl
wget --no-check-certificate https://ftp.vim.org/vim/runtime/spell/es.utf-8.sug
Agregá a .vimrc
:setlocal spell spelllang=es