do not count your chickens before they hatch
Definition:  you should not make plans based on future events that may not happen at all
Usage:  he undermined his opponents and started to celebrate before even crossing the finish line and let his gut down; two of the opponents crossed the finish line before him because he counted his chickens before they hatch

SEPEDI
Translation:  o se ke wa bala dikgogo pele di thwathwaša
Proverb: thari ga e šogwe ngwana a sešo a belegwa

XITSONGA
Translation:  u nga hlayeli swikukwana swi nga si tlhotlhora
Proverb: u nga hlayeli swikukwana swi nga si tlhotlhora

TSHIVENḒA
Translation:  u songo vhala khuhu dzau dzi sa athu u thothonya
Proverb: muḽatshawe u a dzumbama, vha tshi mu wana a si mulandu