Automatically enabling spell checking in vimrc

How can I enable spell checking to be automatically enabled in the .vimrc file? Perhap开发者_运维问答s there's a way to define a quick shortcut that would toggle it instead.

Better yet, is possible to enable it for certain file extensions only?

You should be able to just put set spell in your .vimrc file.

For only certain file extensions, you can use the autocommands in Vim:

au BufRead *.txt setlocal spell

To quickly toggle spelling on and off, you can use the following mapping:

nmap <silent> <leader>s :set spell!<CR>

Spell check tends to slow down the loading of big files.

:e $MYVIMRC

append a line:

setglobal spell spelllang=en_us

(or similar)

:w|source %

Profit

This is similar to Xavier T.'s answer but will spell-check the local buffer only, specify the language or region, and set the toggle to F5. Put the following in ~/.vimrc

:map <F5> :setlocal spell! spelllang=en_us<CR>

You can also use en_au, en_ca, en_gb, etc.