Xihuan: Lord, Have I Become the King of a Foreign Race?

[No system + farming + multi-race + magic technology] The protagonist Lin En, as the second son of the Earl family, was sent to the eastern border of the cold Northland, the barbaric land outside the empire's border fortress. He originally wanted to make a living by farming, but due to a strange combination of circumstances, he turned out to be the alien king of another race? In the Hippogriff Empire, if you call me Baron, I won't pick on you, but outside the Empire, what should you call me? The first protector of the Dwarf Khanman'er Kingdom! The honorary prince of the United Kingdom of Pan-Elf Forest! The adoptive father and regent of the demihuman princess Olafia!