No idea, do not know this, better ask a forgeiner that used the school than Frenchmen who do not need such establishment(s)
But what I can recommend is to contact the EU in Brussels, they have a program to foster cross language learning among EU member states, and have " approved schools " Check with Google, or contact the EU info office.
The next best thing is to take a French girl friend , you will be amazed how fast you will learn that way
