iOS automatically flips the entire ViewController when using a RTL language like Arabic and does a great job with most of the layout, especially text. The default b
While we wait for iOS 9 improved right to left support you could create a UIImageView subclass and override setImage to mirror inside the images as @nikos-m suggests and calling super.image = flipImage.
That way you can easily set all the images views you want to flip using custom classes in Interface Builder instead of having to add IBOutlets.