You can say "error grande", or "equivocación grande".
grande is big in Spanish. pronounciation (grondeh)
Error is the same in Eng. and Span.its pronounces eh-ROR.
grande
grande
Grande.
Desastre afortunado. Error afortunado.
The big party would be "El fiesta grande" in Spanish.
Gran familia is the best way to say "big family" in Spanish.
englesh to spanish
Una familia grande is "one big family" in Spanish.
Grande
Soy grande.