Somehow I've managed to change the language for my blog on my Kindle. What I put in is still in English, but all the prompts and blog language is French. Hmm.
Note: I checked where "Language" is on my desktop (since it was still in English). When I went back to my Kindle to fix the language problem, it had fixed itself. I don't know why it decided to take a short French vacation, but it's back in English now.