I don't think many people actually now that. It wasn't the case in WP7 but in WP8 it works fine.
Go to Settings > language+region and change Country/Region to the marketplace you want to access. A "restart phone" button will appear underneath the Regional format example, press it and let your phone restart. That's it, go to the marketplace and enjoy! I've only downloaded free apps but paid ones shouldn't be an issue, specially if you use PayPal.
Hope this helps some people.
Go to Settings > language+region and change Country/Region to the marketplace you want to access. A "restart phone" button will appear underneath the Regional format example, press it and let your phone restart. That's it, go to the marketplace and enjoy! I've only downloaded free apps but paid ones shouldn't be an issue, specially if you use PayPal.
Hope this helps some people.