How can I say?
I would like to know if I can say?

I would like to speak with you or I would like to speak to you or the both.

Thanks a lot for you reply.

Question

How can I say?
I would like  to know if I can say?
 
I would like to speak  with you or I would like to speak to you or  the both.

Thanks  a lot  for you reply.

Answer

They are both correct, but can have a bit of a different meaning.

"Speak with" emphasizes a conversation between two or more people and emphasizes all people involved.

"Speak to" emphasizes more one person speaking and others listening.

However, in most situations you can use them interchangeably.

Answer

Both of these are correct.

Answer

Yes both are fine.Tous les deux sont justes.