Why wouldn’t they? You’re seriously not listening when I keep saying the CD Key/Licence is all that matters.
You buy the game in UK you get a UK Key and you can USE THAT KEY AND ITS CONTENT ANYWHERE.
You buy the game in US you get a US Key and you can USE THAT KEY AND ITS CONTENT ANYWHERE.
You buy the game in AU you get a AU Key and you can USE THAT KEY AND ITS CONTENT ANYWHERE.
Please tell me you’re seeing a pattern?