Translating Calendars/Events in Squarespace

gistfile1.js

// Declare an Array of months

var englishFullMonths = [ 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December' ],
		englishAbbrMonths = [ 'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec' ],

		spanishFullMonths = [ 'Enero', 'Febrero', 'Marzo', 'Abril', 'Mayo', 'Junio', 'Julio', 'Agosto', 'Septiembre', 'Octubre', 'Noviembre', 'Diciembre' ],
		spanishAbbrMonths = [ 'Ene', 'Feb', 'Mar', 'Abr', 'May', 'Jun', 'Jul', 'Ago', 'Sep', 'Oct', 'Nov', 'Dic' ];


// Wait until DOM ready

(function ($) {

  // Function to wait for an element
	$.fn.waitUntilExists    = function (handler, shouldRunHandlerOnce, isChild) {
    var found       = 'found';
    var $this       = $(this.selector);
    var $elements   = $this.not(function () { return $(this).data(found); }).each(handler).data(found, true);

    if (!isChild) {
      (window.waitUntilExists_Intervals = window.waitUntilExists_Intervals || {})[this.selector] =
        window.setInterval(function () { $this.waitUntilExists(handler, shouldRunHandlerOnce, true); }, 500)
      ;
    }
    else if (shouldRunHandlerOnce && $elements.length) {
      window.clearInterval(window.waitUntilExists_Intervals[this.selector]);
    }

    return $this;
	}

  // This function takes care of the translation
	$.fn.translateMonth = function(el){
		return this.each(function(){

			$this = $(this);

			var node = $this.contents().filter(function(){ return this.nodeType == 3 }).first(),
	      	text = node.text(),
	      	first = text.split(" ", el).join(" "),
	      	month = first,
	      	monthPos,
	      	translatedMonth;

	    // Case there is none
	    if (!node.length) return;

	    // Case it's a full month
	    if ( jQuery.inArray( month, englishFullMonths ) != -1 ) {
	    	monthPos = jQuery.inArray( month, englishFullMonths ),
	    	translatedMonth = spanishFullMonths[monthPos];

		    // Slice dat shit (cut first word)
		    node[0].nodeValue = text.slice(first.length);

		    // Insert word
		    node.before(translatedMonth);
	    }

	    // Case it ain't
	    if ( jQuery.inArray( month, englishAbbrMonths ) != -1 ) {

	    	monthPos = jQuery.inArray( month, englishAbbrMonths ),
	    	translatedMonth = spanishAbbrMonths[monthPos];
	    	$this.html(translatedMonth);
	    }

		});
	};

  // With this you can translate the calendar
	$('.yui3-calendar-header-label').waitUntilExists(function() {
		$('.yui3-calendar-header-label').translateMonth(1);
	});
  
  // With this you can translate an event listing, for example, or any other element that uses the abbreviated forms
	$('.eventlist-datetag-startdate--month').waitUntilExists(function() {
		$('.eventlist-datetag-startdate--month').translateMonth(1);
	});

}(jQuery));

HI,
I've tried this code on my squarespace calendar with french and it doesn't work, can someone help me to make it work?