I still don't understand how people thought this guy was one of the hero's son (it was already mentioned he was an enemy "back then"), but hopefully it's obvious enough now.
In almost every reincarnation story, the reincarnation part is there for the author to self-insert and/or have a convenient excuse to progress the story in any direction without developing characters or worldbuilding. Consider how many of them are centered around an "adventurer guild in a swords...
20 years to translate up to part 5, you have serious expectations about how long a translation group can last before real life catches up. :notlikethis:
I was made to sleep on the hard floor a few times with just a thin sheet below, no pillow, and a one-person cover for 3 kids. My parents wondered why we complained about it. Would not recommend.