you cannot fit a round peg in a square hole
Definition:  if a person is not suited for a specific role, they cannot be forced into it
Usage:  I had to quit the medicine profession as it was my parents’ dream, I ended up in music since you can’t fit a round peg in a square hole

SEPEDI
Translation:  o ka se lokele pheke ya nkgokolo lešobeng la sekwere
Proverb: mmapelo o ja serati, sekgethelwa ga a se rate

XITSONGA
Translation:  u nge nghenisi phekisi ya xirhendzevutani eka mbhovo wa tikhona ta mune to ringana
Proverb: loko mfenhe yi khome vulombe yi famba hi milenge minharhu

TSHIVENḒA
Translation:  ni nga si dzhenise phekisi ya gumba kha mulindi u si gumba
Proverb: a  si halwo lukunda a lu kokomedzwi