On following the comments on this thread the languages on both sides of the puddle have seen changes.
In the sixties living in Scotland the word Umbrella got me some blank stares until I remembered the term bumbershoot. The mechanic filled the petrol, and popped the bonnet to check the works, and the engineer fixed the ailments on the motor car.
Here I ride the trolley, in the U.K. I rode the tram.
Here my tools moved around on a cart, in the U.K. the had their own tool trolley.
In the industrial works:
In the U.K. to learn about maintaining some new machinery being brought over for use in the states:
The person applying oil and lubricants to the equipment was a mechanic.
The person diagnosing and fitting parts to the machine was called a floor engineer.
The person doing the training was called a lead engineer.

In my shop in the U.S. we had an oiler, a mechanic and a trainer as the equivalents.
UK Firm = US Company

In all European countries that I have been in, the first floor is the one ABOVE the ground floor. In the U.S. the first floor IS the ground floor.

I am dating myself with this one:
U.K. Whitworth, Imperial and standard fasteners.
U.S. Coarse thread and fine thread.
To confuse the US mechanics on the forum.
Whitworth and standard spanners (wrenches) are marked by the size of the fastener, not by the width of the opening on the spanner (wrench). Most of the machinery I worked on used these. I had no problem working with these until the metric system started being added.

The parts terminology is also subject to some differences. Made ordering parts interesting...
Ring up the firm = Phone the company.
Many more.