Philadelphia

Hello.  I came across this post on the website, but I noticed that it is nearly three years old.  We are a family living in the Philadelphia area of Pennsylvania in the United States.  Our daughter is very interested in spending the fall of her senior year in high school in France (next fall), and we are looking very closely at IBS-Provence.  While she has taken fours years of French to date, she is not yet bilingual.  (This is one of the reasons she wants to go.)  I wondered if you might have any thoughts on this for us. Many thanks!