Strings and comments can be checked for spelling mistakes. There is a
standard Emacs mode for this purpose,
can be enabled in Haskell buffers. Spelling errors are underlined using
squiggly red lines.
flyspell-prog-mode can be found in
See (emacs)Spelling. Here we point to a couple of useful
To enable spell checking of strings and comments add this line to your
(add-hook 'haskell-mode-hook 'flyspell-prog-mode)