Display result of describe-input-method using a list

[Heime]

I would like to display the result of 'describe-input-method' on the
selections in the list 'cseq'.  Would one call the command 
'describe-input-method' or is it to be done differently ?

(defun razad-multiling (opt)

  (interactive
   (list
    (let ( (cseq '("icelandic-keyboard" "italian-alt-postfix"
                   "spanish-prefix"     "spanish-postfix"
                   "spanish-keyboard"   "french-alt-postfix"
                   "french-postfix"     "french-prefix"
                   "french-keyboard"    "italian-postfix"
                   "italian-keyboard"   "english-dvorak"
                   "icelandic-postfix")) )
      (completing-read
       " Lingu: " cseq nil t "icelandic-postfix"))))

  ;; (call-interactively 'describe-input-method) )