I believe they've said that the bonus scenarios won't be translated as they've already put a massive amount of work in and they released after he started so it'd be awkward if they end up messing with adjustments they've had to make in the code for stuff.
If it's any consolation, the fan translation IS pretty much done at this point. They've been doing a final quality check of everything recently, and the last update on that was them finishing with chapter 6 and going on to do the endings next (and that was said like 4 days ago iirc).
The patched game will still have the bonus scenarios in there iirc, just that they won't be translated, so it should be easy enough to just use mtool or a screen translator as they shouldn't be too long.