French language is known to be a Roman language, just like Spanish, Italian, Swiss Roman… Those Roman languages are told to be originating from Latin language.
When I learnt Latin, one of the first (and most important) things I learnt, were the cases (nominative, accusative…), and let's face it: the Latin language is full of cases.
In the meanwhile I've learnt Dutch, German, French and Spanish, and I've observed that in the mentioned Roman languages there are no traces of the cases (while those traces are very visibly in the non-Roman languages), so my question is: how can languages like French, Spanish (and I guess, also Italian) be called Roman languages if the main grammatical structure of a Roman languages is nowhere to be found in those languages? In other words, while inventing the so-called "Roman languages", where did the cases go?