Localizing variants of English

[Chad Armstrong]

Hello:

I've looked around, but haven't dug up anything regarding my question.

I know how to localize a Cocoa application for various languages  
(English, Dutch, German, etc.).  But is there a way to create  
different dialects of a language?  Such as, is there a way to localize  
(or localise) an application so it is aware of say U.S. English versus  
British English?

I imagine something similar might even pertain to other variants, such  
as Swiss German, versus High German, or Western Spanish versus  
European Spanish, etc.

Regards,

Chad