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I've only ever heard Americans refer to it as canola oil. In the UK and Ireland, it's definitely rapeseed

Canola refers to a specific process invented in Canada, which would explain its prevalence in North America but not Europe.

In the US, maybe. In the UK it's usually called what it is, or the euphemism "vegetable oil". Often next to each other on the shelf.

Often vegetable oil can mean cottonseed out which is to be avoided due to heavy pesticide use on the crops. Do they say anyhow.

I thought that was Canadians calling it Canadian oil.