Hey Hachimitsu! Thanks for replying.
I eventually got my brand new copy a few days after posting that from a French provider, so no worries. I was really scared I'd miss the train though. I had to pay like 40€ (45$) and I think that was the launch price they had at Game, although they were having a sale and selling it for half the price before running out of it. I'd expected i would've had to pay much more because Ebay is soulless, but thankfully I could find a cheap offer at Amazon.es (I'm Prime so yay discount)
The game itself is no different from the US version apart from being published by PQube and being translated to French, Spanish, German... and some other EU Languages. The Spanish translation is reeeally crappy though. Like Google Translate quality. Luckily playing in English isn't that much of a deal for me. I had considered getting the US version in the first place since the Switch is region-free but everything was a bit more expensive (plus, shipping rates) so I got kind of stuck there waiting for a miracle. I don't really like buying physical games through the net since you don't really get to check them before buying, but it finally paid off.
So yeah, again thanks for offering your help, I really appreciate it!