salvo engano

Literally, “except mistake”, or more loosely translated as “unless there is a mistake”.

salvo engano

1. if I'm not mistaken

   Synonym: se não me engano

   Diferente de seus pais, ela teve acesso à educação e, salvo engano, foi a primeira da família a se formar.

   Unlike her parents, she had access to education and, if I'm not mistaken, was the first in her family to graduate.