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# kCFBundleDevelopmentRegionKey

The name of the development language of the bundle.

```
let kCFBundleDevelopmentRegionKey: CFString!
```

## Discussion

When CFBundle looks for resources, the fallback is to look in the lproj whose name is given by the `kCFBundleDevelopmentRegionKey` in the `Info.plist` file. You must, therefore, ensure that a bundle contains an lproj with that exact name containing a copy of every localized resource, otherwise CFBundle cannot guarantee the fallback mechanism will work.

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