iTunes Store - Currencies

From the entire selection of iTunes stores (EU,US,ROW) which stores encourage use of their national currency?

eg

UK - £

Turkey - TL

US - $

Some countries such as Thailand, Azerbaijan, etc are forced to pay in $ (USD) despite offering a selection of media.

I have found this guide but nothing relevant to my question:

What can I buy from the iTunes Store in my country? - Apple Support