String transformations formerly done using CFStringTransform a part of Core Foundation Framework. In iOS 9 string transformation can be done along with the new NSStringTransform* constants a native Cocoa API and no need to deal with bridging to CFStringRef.

Here are some of my favorite transformations that can be done with the new NSStringTransform* API.

print("roger".stringByApplyingTransform(NSStringTransformLatinToGreek, reverse: false)!)
print("roger".stringByApplyingTransform(NSStringTransformLatinToHangul, reverse: false)!)
print("\uD83D\uDC2E".stringByApplyingTransform(NSStringTransformToUnicodeName, reverse: false)!)