What is have not spoken in French many French?

The phrase "have not spoken in French many French" is grammatically incorrect and doesn't make sense. It seems like you're trying to say something like:

"Many French people have not spoken French"

This phrase implies that a large number of people who are native French speakers are not fluent in the language. While there are many reasons why someone might not speak their native language fluently (such as living abroad or losing fluency over time), it's unlikely that "many" French people would fit this description.

If you can clarify what you are trying to say, I can help you translate it into French.