(non-native speaker)
Is there a reason why the English language has “special” words for a specific topic, like related to court (plaintiff, defendant, warrant, litigation), elections/voting (snap election, casting a ballot)?
And in other cases seems lazy, like firefighter, firetruck, homelessness (my favorite), mother-in-law, newspaper.
Law terminology specifically can seem pretty archaic because there’s a high need for terms to be stable over time. In other fields and everyday speech terms can change over time. There’s contracts signed decades or even centuries ago that are still binding today. So it’s practical in a sense if the words within and those used to discuss legal dealings don’t change over time.