re: Would you play a Fallout game set in another country?

It's a US-based series. Louisiana is a natural location, but my pick would be coastal Florida around Cape Canaveral, where the remnants of the US space program would be part of the story. Van Buren (the canceled Fallout 3) was actually going to be at least partially about the Enclave's plans for space.

If they hadn't just done Nuka World, Orlando would have been a natural DLC for such a game. With that already gone, Miami and the Keys. Maybe Cuba if you make it so the US acquired it in the Fallout timeline.