[TIMOB-12467] iOS: Locale.currentLanguage not returning 2 letter code- ISO 639-1 for chinese language

Ti.Locale.currentLanguage is not returning 2 letter code - ISO 639-1 as per our documentation http://docs.appcelerator.com/titanium/latest/#!/api/Titanium.Locale-property-currentLanguage and apple's documentation https://developer.apple.com/library/mac/#documentation/MacOSX/Conceptual/BPInternational/Articles/LanguageDesignations.html It is returning "zh-Hans" when you set the language of your device to chinese.

Actual Result

It is returning "zh.Hans"

Expected Result

It should return "zh"

Repo Steps

1. Include the below testcase in your project's app.js 2. Set the language of your device to Chinese. 3. Open the app and click the show button. 4. It'll show "zh-Hans" in the text area.

var win = Titanium.UI.createWindow();
win.backgroundColor = '#EEE';

var show = Ti.UI.createButton({
	title : 'Show',
	left : 90,
	top : 10,
	width : 140,
	height : 45,
	fontSize : 20
});

var ta = Ti.UI.createTextArea({
	top : 110,
	left : 10,
	width : 300,
	height : 180,
	backgroundColor : 'white',
	fontSize : 18
});

win.add(show);
win.add(ta);

show.addEventListener('click', function() {
	ta.value = "Show current language:" + Ti.Locale.getCurrentLanguage();
});
win.open();