I come back after a (very) long time. I don't think anyone is reading me now, but I still wanted to answer (although given the number of comments I couldn't answer all of them individually).
First of all, despite all the negative (and often nasty) comments I thank you for your responses which, despite your feedback in the forum, were mostly serious and interesting.
I still want to clarify that no, my thesis is NOT on SL. This study represents only a tiny part of my thesis which, after your return, has been reduced even more.
I understand your nervousness about this questionnaire which, I admit, was not up to expectations. I did read your comments, though for the most part really mean, which helped me reshape a few things. Contrary to what you may think, my questionnaire didn't have as much negative feedback in my French version, so the language barrier has something to do with it as well.
Anyway, thank you and sorry to all for bothered you with this survey.
ps: regarding anonymity issues, I don't have any information about your identities. So if, from what you're telling me, this is false and I could indeed have them (don't worry, I'm absolutely not interested about that) I apologize too.
Have a nice day, all the best.