first element is the REGEXP matching these messages. It can match any number
of variants, e.g. different languages. The remaining elements are all of the
form (DIR . LEAVE). If for any one of these the DIR'th subexpression
first element is the REGEXP matching these messages. It can match any number
of variants, e.g. different languages. The remaining elements are all of the
form (DIR . LEAVE). If for any one of these the DIR'th subexpression