at first, I was happy and downloaded it, but when I tried to update it, it says that the apk file is corrupted. My OS is MIUI
I downloaded the apk from mega, installed it on a virtual smartphone - it works, no emergency messages. I don't know how to deal with this. Maybe the game's author will help. Your idea about simply copying files is basically correct (the game itself is an interpreter, it doesn't care what to display on the screen), but once, when I did this (on Windows), the game crashed when choosing a blonde hair color.
On a virtual smartphone, it looks like this:
вот обновленный вариант, вроде бы должен запуститься:
https://mega.nz/file/5ZNWQA6K#CLDV6Oy1qioknfAk93CmScprRGJE5_qxPRrPfuqwvok
Well, it's not hard to delete the game. It's more difficult with saves. This issue has already been discussed here in the comments, but I don't think there's a universal solution. The only thing left to do is play through it again, I guess. I've already done this involuntary several times while testing the translation.
In Windows, saves are recorded separately from the game, but as for Android, to be honest, I don’t know.