Are American Fords and English Fords made by the same people?

The difference between the two is massive. Huge trucks and muscle cars in America and hatch backs and sports cars with Cosworth engines in the UK

They are both made by Ford, but they are tailored to the market that they are sold-in. The US market for cars & the European market are VERY DIFFERENT.

The same company - Yes. But made in totally different factories by different people.

It's the same company. They have assembly plants in many countries around the world. UK fords are not all made at the same place and Fords sold in the US come from many different factories and even different countries. So It's a big international company. Yes, they sell different cars in different markets.

No. They don't fly workers from one country to the other!

The same Ford company, but different designs made in different factories in different countries.

No Cosworths for a long time.
Same company. Different models on some cases. Now getting much closer than in the past.

Same parent corporation, but different factories.

Depends on the car. But usually not, Not all vehicles are sold in all markets. You can't buy an F-350 in the UK, and you can't buy a Ford Ka in the US. Obviously a car built in Ford's Valencia plant would not be built by the people who build cars in Ford's Flat Rock plant. But there are some factories that build both US spec and Euro-spec cars. The Flat Rock plant builds every new Mustang. If you bought a 2015+ Mustang in the UK, it was build at the Flat Rock plant along side the US spec Mustang.

They're made by different people of course.
And of course, not all models are available in all countries.
Here in the US we have the Taurus, but it's not available in Europe (at least not that I'm aware of)

Not sure if it helps, but it may be worth looking into Holden- they may have had a part with Ford in production outside the US