French language Q&A Forum

In writing challenge "Problems at the hotel" - Quel est le problème?

I wrote "Qu'est-ce qui est le problème? - can this be correct as well?

When do we use marron or brun for the color brown? 

Can one also say: c'est ensoleillé ?

Is one more correct, or used more often than the other?

Please refresh my memory.  Is there a construction:  "Il faut que vous (subjunctive)?  E.g. Il faut que vous soyez ici demain?

In the C1 writing challenge "A bad matchmaker" the only word accepted for "matchmaker" is "entremetteurs".

Shouldn't "marieurs" be also accepted?

Is the reason, perhaps, that the first is a word for amateurs, as in the story, while second is a word for a professional?