a chain is only as strong as its weakest link
Definition:  a team, group or organization will fail not because the whole is incompetent but due to the failure of one member of the whole
Usage:  it did not matter how hard the infield players that soccer team played, because the goalkeeper was not confident, they lost the game; it reminded me that a chain is only as strong as its weakest link

SEPEDI
Translation:  go kgwahla ga ketwane go laolwa ke dikarolwana tša yona
Proverb: bagwera ba gago ba re ema o eme, ba dula o dule

XITSONGA
Translation:  nketana yi tiya ntsena loko yi ri na tin’wana to tiya
Proverb: tamatisi rin’we ri borisa bokisi

TSHIVENḒA
Translation:  ngeḓane yo khwaṱha fhedzi u ya nga ha vhushayanungo ya ṱhumanyo yayo
Proverb: ntsa nthihi i tshinya lunda