Setting ispell-dictionary-alist in .emacs

emacs-ispell-dictionary-alist

;;; Spell checking using hunspell
(setq ispell-dictionary-alist
  '((nil "[A-Za-z]" "[^A-Za-z]" "[']" t
     ("-d" "en_US" "-i" "utf-8") nil utf-8)
    ("american"
     "[A-Za-z]" "[^A-Za-z]" "[']" nil
     ("-d" "en_US") nil utf-8)
    ("english"
     "[A-Za-z]" "[^A-Za-z]" "[']" nil
     ("-d" "en_GB") nil utf-8)
    ("british"
     "[A-Za-z]" "[^A-Za-z]" "[']" nil
     ("-d" "en_GB") nil utf-8)
    ("norsk"
     "[A-Za-zÉÆØÅéæøå]" "[^A-Za-zÉÆØÅéæøå]" "[\"]" nil
     ("-d" "nb_NO") "~list" utf-8)))
(eval-after-load "ispell"
  (progn
    (setq ispell-dictionary "english"
          ispell-extra-args '("-a" "-i" "utf-8")
          ispell-silently-savep t)))
(setq-default ispell-program-name "hunspell")