Perhaps the titles here could use some renaming?
As far as I can see, the album does have a full Japanese title: ロストチャイルド オリジナルサウンドトラック インフィニア (Lost Child Original Soundtrack Infinia). As far as I can see, this is printed on the back cover, both sides of the obi and even the discs at the bottom (
http://vgmdb.net/db/covers.php?do=view&cover=154956). I know HOBiRECORDS homepage have it as just "LOST CHILD インフィニア", but I've seen many cases where the titles on the publisher sites actually differ from the titles on the covers.