do not blow your own trumpet
Definition:  you should avoid flaunting your achievements and success in front of other people
Usage:  do not blow your own trumpet by boasting that you make more money than others, there are people who are wealthy but do not flaunt their wealth

SEPEDI
Translation:  o se ke wa letša phala ya gago
Proverb: bogoši bja go ipea ga bo dule

XITSONGA
Translation:  u nga tichayeli nanga
Proverb: ngoma a yi tichayi

TSHIVENḒA
Translation:  u songo lidza phalaphala yau
Proverb: mmbwa hu zwima ya muambi