A new center for French-speaking newcomers in Philadelphia? Mais oui!It’s the budding creation of four local francophones, come here from Africa, Europe, and the Caribbean, who want to cut across national and cultural lines to connect immigrants based on a single shared language. The local increase can go unnoticed, the center founders say, because many immigrants don’t speak or list French as their first language, even though they’re fluent or nearly so. But she wouldn’t give up life in the United States