EN
The fact is generally acknowledged that, based on the genetic relation between French and Latin, knowing one facilitates greatly learning the other. Therefore, if we start learning Latin after we learned French, we expect a rapid progress, but we are faced with a number of difficulties when trying to learn Latin, due to the fact that the two languages belong to different linguistic systems as far as their morphology is concerned. It is true that most of the French vocabulary comes from Latin, but the phonetic changes that have occurred along the centuries made it difficult for us to recognize easily the relation between the two linguistic systems. Apart from the phonetic changes, there are also important semantic changes; what this paper will underline is the frequent dissonance between the French and Latin vocabulary.