in Unity 5.3.0 and 5.2.3,
Application.systemLanguage returns ChineseSimplified instead of ChineseTraditional in IOS with setting language for Taiwan.
As i know, Taiwanese is using ChineseTraditional and IOS default language is as it does.
I hope it fixed soon.
Also, It would be great when somebody let me know how to get “ChineseTraditional” for this.