shoot yourself in the foot
Definition:  to do something without intending to which spoils a situation for yourself
Usage:  his parents reprimanded him about his ways of walking at night, now he got mugged; indeed he shot himself on the foot

SEPEDI
Translation:  go ithunya leotong
Proverb: bjala bo tagile moapei

XITSONGA
Translation:  tiduvule ekondzweni
Proverb: i mhangu ku tilavela

TSHIVENḒA
Translation:  u ḓithuntsha kha mulenzhe
Proverb: khumbana vhulaelo, ntsa i vhuya nga vhuṱala hayo