N木ig木ht木L

N木ig木ht木L (called on the JASRAC database, and called NOfCoTreIsLtUM on the Xenoblade Chronicles X Soundtrack Selection) is Disc 3, Track 3 on the XenobladeX Original Soundtrack and Track 9 on the Xenoblade Chronicles X Soundtrack Selection. It is split into two parts: the first plays from the start until 2:42, and the second plays from then until the end. The first part of z5m20i12r04a28 is a remix of this track.

The first part plays in Noctilum during the day. The second part is a more subdued remix of the first and plays in Noctilum at night.

Etymology
The kanji 木 means 'tree' in Japanese, and when three are together (as in the kanji 森) it means 'forest'. 'Noctilum' itself likely has roots in the Latin 'nox', meaning 'night', which could be why this word also appears in the title. Finally, the L at the end may be a reference to L, who is first met in Noctilum.

The Soundtrack Selection title can have its lowercase and uppercase letters separated to obtain 'forest NOCTILUM'.