Hi! I'll try to answer your questions.
First, I do not know for sure if she speaks French, but I think she does. Her native language would be English
Missy does not have a Facebook page. I don't think she reads any of the fanpages either. So if you see someone pretending to be Missy, don't buy it!
If you want to get in touch with her, Twitter is probably your best bet. You can leave a message at her official site, but I'm not sure how often she checks it. She is not too active on her Twitter, but she does check it and quite often replies to her fans. So if you have any other questions or just want to show your support, that would be your best option.
This is her Twitter:
MPeregrymI hope this answers your questions. Don't be afraid to introduce yourself in the 'Introductions' forum!