Welcome to the forums.
Can you indicate what investigation you have done yourself and what Schools you have found?
You also need to state which Authority's license/certificate you are wishing to attain? FAA or Euro JAA license?
If you are in France and a non US citizen, then you will be limited to FAA Part 141 Schools that are SEVIS approved in order to provide you with the appropriate paperwork to be issued with a Visa. This therefore narrows your choice down considerably.
If you are seeking a JAA approved school then your choice is limited even further with a handful of those schools being in Florida and maybe one in California.
A quick search of these forums will reveal a great deal of answers to your questions.