Don’t sweat it.
The Portuguese and English sentences do not appear to be equivalent. The Portuguese was added as a translation of the English on Tatoeba, but it appears that the contributor misread the English sentence as being “Don’t swear it”. This has led to an incorrect translation.
The sentence and translation have been unlinked on Tatoeba (they were unlinked in April 2016).
I’ve reported this using the little red flag.