Mi nombre de guerra es El caballero del gabán verde

Mi nombre de guerra es El caballero del gabán verde
 

How do you say Nombre de Guerra in English? It´s used to avoid giving identity etc.. something like nickname, alias etc... But a different connotation. Usually to chat with a different name.

The standard English expression is Nom de Plume. :thinking:

what about nom de guerre?

Probably better. Nom de Plume is usually just for writing.

I don't think the term nom de guerre would be understood very much outside of France although it is a term used among some English speakers. A more widely understood term in the English-speaking world is pseudonymn.

pseudónimo

what about nickname?

nickname is a little different, because it's not used to hide anything. It's
an apodo.
Nom de guerre, pseudomymn and alias imply something secretive.

If you're talking about chatting online - username or handle.

He visto una canción se llaman "con nombre de guerra" , y me parece ser sobre una prostituta :thinking:

Nombre de guerra es como, alias, stagename, handle, etc.?