I just ordered this box from Amazon. It's probably to late for all you above about the subtitles but I will come back in a week or so and write which season contains which subtitle language. I would like to know myself (Swedish) but I'll survive if it isn't there. As long there is English subtitles I'll manage :)
Hearing impaired implies/means that there are extra explanation in the subtitles for people with hearing disabilities (deaf people for example). So you have information like 'music playing ', 'heavy breathing ' etc so those people can understand what noises are in the scene (since they can't hear it properly).
When it comes to your French language question. There are French subtitles on every disc/season according to the box. When I look at the individual cases it says French dub/language as well. So you can have it either way you want when you watch the show. But there are no French subtitles for the hearing impaired.
And believe me, it's one of the most amazing shows you'll come around and see! It's amazing! :)
And sorry if I misspelled anything. I'm swedish :P
I'm french and my english isn't good so you're perfect, thanks. :-)
So hearing impaired is more explicative than simple subtitles. There is an error on description and a photo even if this is not very serious.
And yes the show is wonderfull and it's my favorite TV Series. And this complet box is simple but pretty cool, more than the seasons one by one. I like the US version but she is not be viewable in Europe. And french integrale is not good.