Can someone plz tell me if at least he gets reincarnated with his family and lives happily...

If you're talking about Deon then yes he did. But he sinned too much so his next life is worse. The good part is that he has his brother as a guardian spirit, though Deon isn't aware of his identity which makes sense because he doesn't remember his life as Deon.

Does that novel has a English translation?

https://indratranslations.com/series/the-immortal-has-guardian-spirit You can read it here!