Capabilities.language for variants of the same language (i.e: Portuguese from Portugal and Brazil)

According to the documentation, Capabilities.language has a fixed list of possible values, as shown here:

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/system/Capabiliti es.html#language

For Portuguese there's only one entry: "pt"

So will Capabilites.language return the same "pt" value for people from Portugal and from Brazil?

How can I tell the difference? How can i get the "pt-br" or "pt-pt" strings?

Thanks!