$.fn.ketchup.messages = {
  'required':     'This field is required.',
  'minlength':    'This field must have a minimal length of $arg1.',
  'maxlength':    'This field must have a maximal length of $arg1.',
  'rangelength':  'This field must have a length between $arg1 and $arg2.',
  'min':          'Must be at least $arg1.',
  'max':          'Can not be greater than $arg1.',
  'range':        'Must be between $arg1 and $arg2.',
  'number':       'Must be a number.',
  'digits':       'Must be digits.',
  'email':        'Must be a valid E-Mail.',
  'url':          'Must be a valid URL.',
  'username':     'Must be a valid username.',
  'match':        'Must match the field above.',
  'date':         'Must be a valid date.',
  'minselect':    'Select at least $arg1 checkboxes.',
  'maxselect':    'Select not more than $arg1 checkboxes.',
  'rangeselect':  'Select between $arg1 and $arg2 checkboxes.'
};