I think what you mean is compound words vs other words?
Wikipedia says there are lots of compound words in English.
Plaintiff is borrowed from Old French. Litigation from Latin…
I suppose it boils down to when and under what circumstances a term was needed to describe something. Sometimes there was a word from another language available. Or the whole subject came from a different culture. And sometimes they just described it with a compound of what it resembles. And how to make up terms probably also depends on what is en vogue at the time.
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