Answer:
Las palabras se las lleva el viento.
Explanation:
'Las palabras se las lleva el viento' means 'words are taken away by the wind' meanning that words alone, without facts, aren't enough.
So it will be equivalent to 'actions speak louder than words' (in spanish 'los hechos hablan más fuerte que las palabras'), because they both say that facts are more important than words.
