Can You Sing In French Language?

What is it that's giving you problems?  Is it articulating the language, itself?  Is it that you're trying to use non-French grammar while singing and thus getting words out of order?  Is it non-familiarity with the lyrics? 

Sometimes, singing in a language with which you're not familiar poses the same problems as speaking in it.  Let's be honest here, your mouth and tongue have to do things to create those sounds that seem almost unnatural!

You might want to listen to some recordings of French singing and try to emulate what they're doing.

Bonne Chance et chantez bien!