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?

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

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

au BufRead *.txt setlocal spell

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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.

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:e $MYVIMRC

append a line:

setglobal spell spelllang=en_us

(or similar)

:w|source %

Profit

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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.