Since the RK OST team usually officially translates the general headings into English, we can notice that sometimes they rather leave romanji instead of literally translate the word(s).
So, if we take in consideration other Kenshin albums like “Brilliant Collection”:
The Memorial Hen Album るろうに剣心－明治剣客浪漫譚－～Brilliant Collection～
(The Memorial Hen Album RUROUNI KENSHIN -Meiji Kenkaku Romantan- ~Brilliant Collection~)
then the Director’s collection album English title should be like this:
The Unreleased Original Soundtrack Shu RUROUNI KENSHIN —Meiji Kenkaku Romantan— Director’s Collection
Not only it will give more consistency* with other Kenshin album titles, but will also avoid the awkward redundancy of the word “Collection” (shu/collection). 'Brilliant Collection' album also avoided the “Compilation” using “Hen” instead.
Also, the series title るろうに剣心 was never literally translated into “Wandering Kenshin” or similar. The only thing they always do is capitalize it, so it should stay “RUROUNI KENSHIN”.
Same for the 明治剣客浪漫譚. There was never an official English/Romaji title calling it “Romantic Tales of a Meiji Swordsman”, “Meiji Swordsman Romantic Story” or similar. Instead, we see that some of these albums have officially printed the series’ name just like this: RUROUNI KENSHIN -Meiji Kenkaku Romantan-
Example1:
http://i29.photobucket.com/albums/c291/newsblade/2R.png
Example2:
http://i29.photobucket.com/albums/c291/newsblade/3R.png
Example3:
http://i29.photobucket.com/albums/c291/newsblade/4R.png
(I’m not talking about “product names” here, that’s another story. I’m just suggesting what these album names should be. I'm also not talking about more recent albums that will appear after 2011).
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RK album titles seems messed, but there are only two patterns they obey:
Norm#1:
• RUROUNI KENSHIN -Meiji Kenkaku Romantan- THE BEST THEME COLLECTION
• RUROUNI KENSHIN -Meiji Kenkaku Romantan- PREMIUM COLLECTION
• RUROUNI KENSHIN -Meiji Kenkaku Romantan- The Original SoundTrack
• RUROUNI KENSHIN -Meiji Kenkaku Romantan- The Original Soundtrack II DEPARTURE
• RUROUNI KENSHIN -Meiji Kenkaku Romantan- The Original Soundtrack III -Kyoto Decisive Battle-
• RUROUNI KENSHIN -Meiji Kenkaku Romantan- The Original Soundtrack IV -Let It Burn-
*=Norm#2:
• The Original Vocal Album RUROUNI KENSHIN -Meiji Kenkaku Romantan- SONGS
• The Original Vocal Album RUROUNI KENSHIN -Meiji Kenkaku Romantan- SONGS 2
• The Memorial Hen Album RUROUNI KENSHIN -Meiji Kenkaku Romantan- ~Brilliant Collection~
• The Unreleased Original Soundtrack Shu RUROUNI KENSHIN -Meiji Kenkaku Romantan- Director’s Collection
• Original Video Animation RUROUNI KENSHIN -Meiji Kenkaku Romantan- TSUHIOKU-HEN Original Soundtrack
• Original Video Animation RUROUNI KENSHIN -Meiji Kenkaku Romantan- SEISOU-HEN Original Soundtrack
• Animation RUROUNI KENSHIN -Meiji Kenkaku Romantan- COMPLETE CD・BOX
• theatrical animation original soundtrack RUROUNI KENSHIN -Meiji Kenkaku Romantan- Requiem for the Ishin Shishi / TARO IWASHIRO
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Note that capital words (e.g. DEPARTURE, THE BEST THEME COLLECTION, PREMIUM COLLECTION, etc.) are never used between dashes (–) or (~) or (textbox)