Make Translatable strings with Ninja Forms Date Picker.

index.php

<?php
/*
Plugin Name: Date Picker test
*/

add_filter( 'ninja_forms_enqueue_scripts', 'nf_datepicker_options' );

function nf_datepicker_options()
{
    wp_enqueue_script( 'nf_datepicker_options', plugin_dir_url( __FILE__ ) . 'script.js', array( 'jquery' ), false, true );

}

script.js

jQuery( document ).ready( function() {
    new(Marionette.Object.extend( {

        initialize: function() {
            this.listenTo( Backbone.Radio.channel( 'pikaday' ), 'init', this.modifyDatepicker );
        },
        
        //Change the strings below to translate the string in our datepicker. 
        modifyDatepicker: function( dateObject, fieldModel ) {
            dateObject.pikaday._o.i18n = {
                previousMonth : 'Previous Month',
                nextMonth     : 'Next Month',
                months        : ['January','February','March','April','May','June','July','August','September','October','November','December'],
                weekdays      : ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],
                weekdaysShort : ['Sun','Mon','Tue','Wed','Thu','Fri','Sat']
            };

        }
    }));
});

I'm also interested in knowing how to implement this?? Can anyone tell me/us?