Thank you for your quick response. It is set to English and it was when I downloaded the app. I don't believe my tablet is rooted or has any 3rd party ROMs. I've only ever installed some games on it, I don't use it for anything else. The issue has actually lessened a little and wasn't really present for episode 5, but the 400 Days bonus episode immediately started with French subtitles and options. It's very strange how it switches back to English and then cycles through other languages. Sometimes it lasts a few minutes, sometimes it persists through chapters.