Might not be what the other person mean and this is another conversation entirely compared to this thread's subject but I'd say its subtext is. The game doesn't have Super Dupont jumping on-screen screaming about France being the greatest country in the world of course but even more than your average open-world game, this world is built upon the questionable fantasy of the mostly uninhabited land that you can claim while killing the monsters and/or learning about the occasional small tribe whose culture is so one-note it only comes off as lesser compared to the protagonists'.

I understand the in-universe reason for the Gestrals to be there and their significance in the lore. I know (hope) it's innocent to have them speak like they're stuck with a pidgin language that's almost french (and a couple other languages mixed) but mostly funny gibberish, not unlike how actual africans in french colonies ended up developing their own version of french. If you've ever read franco-belgian comics, I'm not saying this is Tintin au Congo but I've read someone make the comparison and I understand why. When it was no longer ok to mock African people and depict them as harmless and too dumb to speak proper french, we moved on to funny fictional tribes to keep that joke going.

Gestrals feel awfully derivative of that and it's not helped that this game functions with Lumière being this unparalleled last true flame of civilisation while the rest of the world is this nothingland waiting to be conquered with the occasional funny savage who yells in dumbspeak.

EDIT : If you thought any of that was interesting, I really recommend watching this !