I was curious about this and looked it up on google trends. It looks like acetaminophen is the more commonly searched term.

https://trends.google.com/trends/explore?q=paracetamol,%2Fm%...

I get the results I'd expect: acetaminophen is the vast leader in the US and Canada only, while paracetamol totally dominates essentially everywhere else and is by far the more searched term globally.