Yes, a person can be prosecuted for a crime committed in Another Country if the crime is considered illegal in both the country where it was committed and the country where the person is being prosecuted. This is known as extraterritorial jurisdiction.
Yes.
If a crime is committed in the U.S. (and perjury is a crime) then the person who committed it can be prosecuted, regardless of his country of origin or citizenship. The only exceptions are people with diplomatic immunity.
A person from another country is typically called a foreigner or an international person.
When someone encourages or helps another person to commit an illegal act or crime, it is called "aiding and abetting." And, yes, you can be prosecuted for it.
A person who comes from another country is called an immigrant.
How do you sponsor a person coming from another country to the US
No. If your not married the only crime he has committed is pre-marital sex. He is as guilty with you as he is with her. The military only extends the uniform code of military justice to cover spouses.
Firstly, if the person is married in an another country and has come to a particular country illegally it is surely invalid to marry the person. Another thing, if the person is a citizen of that particular country in which he has married it is his right to first take a citizen of that country in which he is going to marry and then he can marry a person another to his own country.
Copying an application onto another computer is considered fraud. A person is breaking the law. Never do this and you will not be prosecuted for it.
The crime committed when someone threatens another person with a gun is typically considered assault with a deadly weapon.
Treason.
This would be treason.