fall on ones sword
Definition:  a person in a position of leadership should assume responsibility or take the blame on behalf of other people, especially by resigning from that position
Usage:  the CEO of the telecom company heroically fell on his sword, insisting that it was his decision to drop the data prices which resulted in investors pulling out

SEPEDI
Translation:  go wela lerumong la gago
Proverb: mokgakgati o a ikgela

XITSONGA
Translation:  ku wa hi ntlhari ra yena
Proverb: loyi a tshivelaka ndzilo u fanele ku wu orhela

TSHIVENḒA
Translation:  u wela nṱha ha banga ḽau
Proverb: muhwalampambo ndi mufhedzagomelelo