How to Say "the establishment" in Spanish
The Spanish word for “the establishment” is “casta” — C1 level. This is a very common word in everyday Spanish.
English → SpanishC1
nounC1informal
political elite or privileged class

Examples
Los manifestantes gritaban contra la casta política.
The protesters were shouting against the political establishment.
Se refiere a ellos como 'la casta' porque cree que solo buscan su propio beneficio.
He refers to them as 'the caste' because he believes they only look out for their own benefit.
The Power of the Article
In modern politics, it is almost always used with the definite article: 'la casta.' This turns it into a specific label for 'the elite.'
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