How can I get language setting of iPhone in Unity native function?

Hi all,

I've try everything to find a way to get the language setting of iPhone via native u3d function. however, I found two ways those are 1) use guiText.text = Application.systemLanguage.ToString(); But I always get 'Unknown' in Chinese language. 2) use NSUserDefaults and PlayerPrefs But it's not u3d native function, I have to do some extra work when I want to develop my Android version.

So, anyone please can show me is there a PERFECT way to do that? thank you very much!