I had a hard time finding documentation on configuring parsley.js. Here's what I've found you can configure.

parsley.config.js

// Parsley default config

$.fn.parsley.defaults = {
  inputs: 'input, textarea, select',
  excluded: 'input[type=hidden], :disabled',
  trigger: 'change',
  animate: true,
  animateDuration: 300,
  focus: 'first',
  validationMinlength: 3,
  successClass: 'has-success',
  errorClass: 'has-error',
  errorMessage: false,
  validators: {},
  showErrors: true,
  messages: {
    // parsley //////////////////////////////////////
    defaultMessage: "This value seems to be invalid.",
      type: {
        email:      "This value should be a valid email.",
        url:        "This value should be a valid url.",
        urlstrict:  "This value should be a valid url.",
        number:     "This value should be a valid number.",
        digits:     "This value should be digits.",
        dateIso:    "This value should be a valid date (YYYY-MM-DD).",
        alphanum:   "This value should be alphanumeric.",
        phone:      "This value should be a valid phone number."
      },
      notnull:        "This value should not be null.",
      notblank:       "This value should not be blank.",
      required:       "This value is required.",
      regexp:         "This value seems to be invalid.",
      min:            "This value should be greater than or equal to %s.",
      max:            "This value should be lower than or equal to %s.",
      range:          "This value should be between %s and %s.",
      minlength:      "This value is too short. It should have %s characters or more.",
      maxlength:      "This value is too long. It should have %s characters or less.",
      rangelength:    "This value length is invalid. It should be between %s and %s characters long.",
      mincheck:       "You must select at least %s choices.",
      maxcheck:       "You must select %s choices or less.",
      rangecheck:     "You must select between %s and %s choices.",
      equalto:        "This value should be the same."

    // parsley.extend ///////////////////////////////,
    minwords:       "This value should have %s words at least.",
    maxwords:       "This value should have %s words maximum.",
    rangewords:     "This value should have between %s and %s words.",
    greaterthan:    "This value should be greater than %s.",
    lessthan:       "This value should be less than %s.",
    beforedate:     "This date should be before %s.",
    afterdate:      "This date should be after %s.",
    americandate:        "This value should be a valid date (MM/DD/YYYY)."
  },
  validateIfUnchanged: false,
  errors: {
    classHandler: function(elem, isRadioOrCheckbox) {
      return $(elem).parents('.form-group');
    },
    container: function(elem, isRadioOrCheckbox) {},
    errorsWrapper: '<div class="help-block well well-sm"></div>',
    errorElem: '<span></span>'
  },
  listeners: {
    onFieldValidate: function(elem, ParsleyForm) {
      return false;
    },
    onFormValidate: function(isFormValid, event, ParsleyForm) {},
    onFieldError: function(elem, constraints, ParsleyField) {},
    onFieldSuccess: function(elem, constraints, ParsleyField) {}
  }
};

thanks a lot really. i want to set custom error message for password equalto retype error.

thanks

if you want custom locate settings see here for example turkish language
https://github.com/guillaumepotier/Parsley.js/blob/master/dist/i18n/tr.js