What kind of legal system does France use?

French law is based in some respects on Roman law and is codified. That means that, unlike in the U.S. or England, precedent is relatively unimportant. It's the codified 'rule-book' that really counts. The *basis* of French law dates from the Napoleonic period and is often referred to as the "Code Napoleon" though some of it wasn't fully collated till 1816.