Imagine that I am building an application in public and someone copies my work and starts making money from it. Can I refer to the guy who's copied my product a 'copycat' and a 'plagiarist' interchangeably?
I did some research before and know that "plagiarists" originates from 'plagiarus' which was first used to call someone who recited Martial's books without his permissions. And most intellectual properties related to plagiarization I've found are textual.
However, I also found the following definition of copycat from Wiktionary, and then I thought copycats and plagiarists are interchangeable:
I think 'work' has a much larger scope than textual content. What's more, I don't think 'copycat' is informal anymore, since you can find its uses in many academic contexts/papers, for example Making the Chinese Copycat: Trademarks and Recipes in Early Twentieth-Century Global Science and Capitalism, and Rocket Internet: organizing a startup factory, and MIT: THE CHINESE COPYCAT AND THE MAKING OF MODERN CAPITALISM.
Plagiarism also covers copying of ideas, as written in this Tweet by an American politician:
Looks like Trump is committing straight up plagiarism of DeSantis' ideas. Again.
Then in my case, my product is text based, i.e., code, and the pirate also stole my ideas.
If I am not wrong, in my scenario copycats and plagiarists are interchangeable, right?