I'm not sure what the "health" of a language is; the power/influence of a language, however, is a direct factor of the power/influence of its main speakers, and

I'm not sure what the "health" of a language is; the power/influence of a language, however, is a direct factor of the power/influence of its main speakers, and doesn't have anything to do with spelling. English is the world language because of the US economy; when French was the language of reference, orthographe hadn't happened yet. Regarding terrorism: current French "terrorists" are misfits; and I use quotes not because their acts aren't despicable or horrible, but because their main purpose isn't to terrorise (in order to obtain something by way of fear). It's to exact vengeance (as you'll learn if you watch their videos, they say as much). They are not in pursuit of any kind of political gain; they want to inflict pain and nothing else. Orthographe, in my (controversial) view, is not a cause and probably not even a factor, but really a symptom of how French society works; and the way it works is, it upsets everyone except the very elite.