Yeah, it definitely doesn't go by parent company. The way the game sorts that out is flawed already, but going by parent company would mean a LOT of changes. Some of them (I can think of at the moment) are:
Mazda and Volvo would become American as they're owned by Ford, aren't they? (On top of that, some of the Jaguars and the Range Rover should also be American as they were owned by Ford when made.)
Vauxhall, Open, and Holden would become American as well, as they're all General Motors brands. (Plus, didn't GM also have an ownership stake in such brands as Lotus, Isuzu, and Suzuki at one time or another?)
You'd have to split the Dodge and Chrysler cars between American, German and Italian - depending on the year.
Seat would change from Spanish to German because they're owned by VW.
Then again, if we're disregarding parent compant, it actually makes sense to consider Scion an American car - ???
I just want to know:
How Lexus can be American, Japanese, and Korean?
How can some Cobras be American and some from the UK?
The only way I can resolve this lunacy is to not give a 🤬, and just enjoy the cars!
Peace...