This single featuring four versions of the legendary classic "Wasureji no Kotonoha" by the epic pop unit Mirai Kodai Orchestra, including the official English translation. "Forgotten Words (feat. GUMI)" was released as an official Synthesizer V AI Megpoid demo song, and is the official English translation. There is also a Japanese version by GUMI, "Wasureji no Kotonoha (feat. GUMI)". "Wasureji no Kotonoha (feat. Kiwako Ashimine) [2022]" features original vocalist Kiwako Ashimine. An instrumental version of the same song is also on the single.