well the "J" in french isn't said like a "H" (which doesn't sound at all in french ...) it is more said like in english, only, in english it is more "Djjj" in french it is "jj" (e.g. garage sounds like "garadje"). I think that the "J" sounds like in french for all the other latin-based languages.
and in german, the "J" it sounds like a "E", e.g. "ja" in german sounds like "ya" in english.