Actually now that I think about it, if 放映地区 (Houei Chiku) is broadcast area and 未放映地区 (Mihouei Chiku) is non-broadcast area, then wouldn't that mean that 放映地区合体 (Houei Chiku Gattai) would simply be "Broadcast Area
s Combined?" Maybe I should go with "Jubei-chan: Secret of the Lovely Eyepatch Broadcast Areas Combined Original Soundtrack" Though that admittedly does sound a little bit odd in English, but it's seemly the closest equivalent.
Though looking at the actual cover, I noticed that there's actually some
additional text at the very top, the characters look familiar though, doesn't that just mean something along the lines of "TV Animation?" If so, I can probably exclude that part since it's not uncommon for soundtracks to specify if they're from a movie or series at the top of the albulm title.
Regardless, maybe it might just be best to omit the whole broadcast area part all together seeing as it doesn't translate all that well into English and I don't believe I've ever encountered a single other soundtrack that made such a bizarre distinction. The title for the sequel series' soundtrack did include ("~気付けば音楽聴いていた~" "Kizukeba Ongaku Kiiteita"/"When I realized, I was listening to the music,") at the very end after the OST bit, but that could just count as flavor text and not necessarily part of the actual albulm title, so perhaps the same logic could apply with the whole broadcast area stuff.