The apple dev documentation has a nice overview of some of the concerns that need to be taken into account for this to work: https://developer.apple.com/librar

The apple dev documentation has a nice overview of some of the concerns that need to be taken into account for this to work: https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/Strings/Articles/stringsClusters.html https://developer.apple.com/library/content/documentation/Co... It's probably one of the better approaches - but it's still not clear if it (alone) allows a developer that speaks only English to develop a text indexing or editing system that works well across English, Japanese, Arabic, Hangul and Dutch for example.