I looked this up and couldn't find an answer. Many in the former confederate states feel the flag is a part of their heritage, while northerners and many others see it as a symbol of treason and slavery (to be debated elsewhere). My question is, and one I couldn't find the answer to, are any flags of countries who lost a civil war flown in the victorious country? Example: I don't believe North Vietnam raises the flag of South Vietnam over any government buildings, etc. Do other countries honor a country/party that fought/rebelled against it and lost?
Any help would be great!
Well first things first: The "Confederate flag" you're probably referring to is the "Southern Cross" flag, or the traditional "Rebel" flag that was on the roof of the General Lee car in the Dukes of Hazzard TV show.
That flag was never an "official" flag of the Confederacy. It was, however, the official battle flag of the Confederate Army of Northern Virginia, which was commanded by none other than General Robert E. Lee. It was also a standard for the Confederate Navy. So this is really more like a modern day unit insignia. Like the "Tropic Lightning" or "Air Cavalry" patches you might see on modern military uniforms. It is important to understand the distinction.
So to address your question, I am not aware of any other nation that flies a "losing civil war flag". But with the exception of a few southern states that just add or take away something (I'm looking at you, Georgia and Alabama), neither does the United States.
References:
https://en.wikipedia.org/wiki/Flags_of_the_Confederate_States_of_America#The_.22Confederate_flag.22
http://www.sonofthesouth.net/leefoundation/Confederate_Flag.htm