As this game is not played in Spanish-speaking countries, there is no proper term for it. Probably the best translation would be "fútbol americano con banderas", (American football with flags), but you would have to describe it for a Spanish speaker to understand how flag-football is played.
Bandera
El significado de los colores de la bandera de Costa Rica.
Sister in law in Spanish is cunada.
How to say "hi" in spanish is Hola. How to say "bye" in spanish is Adios.
The Spanish word for "soccer" is "fútbol", which translates to the English word "football", or "fútbol asociación", which translates to "Association football".
flag is bandera in Spanish
The flag in Spanish is "la bandera".
bandera
eseana
bandera girando
Football in Spanish is fútbol. :)
futbol
La bandera de Uruguay.
Flag football or touch football
Mirando fútbol.
dia de la banderita
día de la bandera