would be a mistake
Eso sería un error.
That would be a mistake.
— Perfectos desconocidos (2016)
Sería un error terrible.
It would be a terrible mistake.
— El Canto del Lobo (2019)
Esto sería un error.
This would be a mistake.
Sin música la vida sería un error.
Without music, life would be a mistake.
Sería un error salvaje.
That would be a wild mistake.
— El espejo (1975)
Tom cree que hacer eso sería un error.
Tom believes that doing that would be a mistake.