It depends on each release. For the album title, we have 3 main types: "display", "original", and "romaji". Frequently for Japanese albums, the "original" title contains the Japanese text, and the "display" title (the one in big golden letters) is a translation of that. Some Japanese albums (such as the one you linked to) already have an English title, so we use that in the "display" title (the Japanese title isn't actually a translation; it's provided on the official site and may be printed on the spinecard as well).
As for the tracklist, frequently the English version is a user-submitted translation of the default Japanese tracklist printed on the album. There are cases where a Japanese album does come with both Japanese and English tracklists, but this is uncommon. Also, if an album is released domestically with an official translated tracklist (or the domestic game release contains a sound test with translated track titles), we'll use that version -- however if it differs significantly from the user translation, we'll post both versions of the English tracklists (see
the Okami soundtrack).
I understand that currently it may be difficult to discern which is the "default" tracklist for a particular album, or whether it is official or user-translated. That'll be fixed in the future, when we restructure our database and interface.