创建本地化的iPhone应用程序，但允许用户更改应用程序的语言

I'm working on a localized app and everything is working fine. The problem is I want to allow the user to specifically select the lenguage for the specific app, in the app settings folder. This should users that their phone is set to one language (e.g. french) to set the app to work in English.I'm working on a localized app and everything i