First of all Happy New Year!
Second of all are you thinking of translating charon's latest game:4 am fake worlds end?
Viewing post in 4 Seasons, 4 Girls!! English Patch comments
I am. I did my translation pass up to the start of the 3rd chapter at this time of writing, actually.
There are a TON of cameo appearances in it. Pretty much anyone in a work Charon made in 2017 or earlier shows up for at least a few minutes. When I release my patch, I'm planning to compile a list of all the works referenced.