Hi shanks.

I think there are different words for knowledge in English, though without seeing the specific French varieties I've no idea whether these English words are of equivalent value.

For instance, isn't understanding a specific type of knowledge? Possibly understanding something is better than merely knowing it; the knowledge is deeper and more instinctive.

Another one is skill, the knowledge required to do something specific. This is usually achieved through study and practice, the born genius being a notable exception.
I suppose talent relates more to innate knowledge.

We also talk about good sense and especially common sense. That's like a general knowledge of day-to-day living. I think common sense is actually fairly uncommon, but then I would, wouldn't I?

Maybe you could give us a couple of specific examples of where the English language falls short, and then the Smiths can set to work on those.

Fisk