How to Say "uncivilized" in Spanish
The Spanish word for “uncivilized” is “salvaje” — B2 level.
English → SpanishB2
adjectiveB2neutral/informal
rude or lacking manners

Examples
Hubo una protesta salvaje en la ciudad, con muchos disturbios.
There was a fierce/violent protest in the city, with many disturbances.
Su reacción fue tan salvaje que nadie supo qué hacer.
His reaction was so brutal/uncivilized that nobody knew what to do.
Adverb Form
To say something happened 'wildly' or 'savagely,' you add '-mente' to the feminine form: 'salvajemente'.
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