Well, I hope it can be changed too, one thing is the language and another is the currency of your country. By the way, it doesn’t come up in euros when I change the language, I hope it’s a bug and not that they think Spain isn’t in Europe.
Another curious detail is that it seems that they apply the VAT after the conversion to euros. From yesterday to today it has gone from 0.95 to 1.05 so we also pay more VAT.
It really seems that this FAV has been released in early access.