How to Say "banner" in Spanish
The Spanish word for “banner” is “bandera” — B1 level.
English → SpanishB1
nounB1neutral/formal
figurative cause or principle

Examples
La igualdad es la principal bandera de su partido político.
Equality is the main banner (or cause) of their political party.
Ella levantó la bandera de la justicia social en la reunión.
She raised the banner of social justice at the meeting (meaning she championed the cause).
Figurative Use
In this context, 'bandera' doesn't mean a physical flag, but the main belief, goal, or principle that a person or group supports.
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