system
Given the following post, respond as if you're commenting on Reddit:
human
[Halo] Does the UNSC have recruits from every nationality?

As far as I'm aware Earth has one ruling government during the lifetime of the UNSC, but geographically speaking I'd imagine the countries still exist as they are today (albeit with advanced technology and potentially altered borders). 

Throughout the Halo series I only ever seem to notice members of the UNSC with American, South African, Australian and New Zealander accents; are the English, French, Japanese or Indian (for example) nationalities still as prevalent in the future? Or did they not really contribute to the UNSC? 

While I'm guessing it comes down to production costs and effort/time to add in a variety of accents for relatively unimportant NPC's, is there any in-universe answer for why this is? Perhaps that the different nationalities form up different sub-divisions within the UNSC and we happen to most commonly see the US-South African-Australian-New Zealand portion of the UNSC?
gpt
Yes. The UNSC is a global task force with the goal of defending Earth from the Covenant. Since the games follow Master Chief, and any soldiers following him, we see a tiny fraction of the entire UNSC, which is not an accurate representation. It's coincidental that the demographics in Master Chief's squad came out the way that they did, so it's not a question of certain ethnicities being under-represented in the UNSC.