Ms. Boyer can surely assist you on that, but the term "égalité réelle" is translated in English as "substantive equality". First, it concerns access to services. Part IV concerns access to services in practice or in practical terms, as I said. Substantive equality also includes equality of status, and sometimes equality of status also calls for formal equality, for example by enacting laws. Sometimes, too, there must be a degree of formality.
So formal equality does not necessarily rule out substantive equality right away when it comes to the status of the language.