European empires colonised the world centuries ago and invented the concept of race to justify why they were treating everyone else as sub-human. Britain exported that ideology to the US, and both of their empires, amongst many others, exported the concept globally. No continent on Earth was spared. I live in Australia and the Indigenous people here talk about “black fellas” and “white fellas” to describe their particular experience of racist oppression.
To claim “black” as a racist concept only exists in the US just proves that you don’t know very much about the topic.