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It's most likely that anything that comes from French, being a Romance language and all that, can trace its origin in Latin. But repertoire and inventory haven't taken the straight path into the English language; they've both actually taken a detour through French. From an etymological point of view, it is important to take this into consideration because those detours tend to obscure both form and meaning of a word.Actually repertoire hails from Latin in origin as well. Lol