Send scouts to more unknown countries. I don't know why, I reached 76% but the achievements won't unlock. PS. every season, regens will be created. Therefore, you need to scout the same country again to increase the scouting knowledge.
Continental King means that you need to win 3 continental cups , eg,
- UEFA Champions League in Europe (Barcelona or Real Madrid)
- Copa Libertadores in South America (Internacional or Santos)
- Asian Champions League in Asia (Suwon or Ulsan)
- African Champions League in Africa (Sundowns or Supersport Utd)