+ case topic
+ when 'define'
+ _('define <phrase> [from <database>] => Show definition of a phrase')
+ when 'match'
+ _('match <phrase> [using <strategy>] [from <database>] => Show phrases matching the given pattern')
+ when 'server information'
+ _('dictclient databases => List databases; dictclient strategies => List strategies')
+ else
+ _('look up phrases on the configured DICT server. topics: define, match, server information')
+ end