Treason.
Legendary
spanophile?
That person would be called a missionary. The work would be called missions.
Embargo!
treason
treason
An undocumented immigrant
Someone who comes from another country is typically referred to as a "foreigner" or "immigrant," depending on the context. A foreigner is generally anyone who is not a citizen of the country they are in, while an immigrant specifically refers to someone who moves to a new country with the intention of residing there permanently or for an extended period.
refugees
Someone who betrays their country is called a traitor
One who opposes is called an adversary or an opponent. They are someone who is against or in conflict with another person or group.
When you leave a country it is called emigration.When you arrive in a country it is called immigration.