do not cast pearls before swine
Definition:  do not waste your effort or offer something valuable to someone who does not show appreciation or value for it
Usage:  Faith knew that her little boy is not a tech person but still bought him a Mac PC, the boy sold that PC for ten times less than its market value; what she did was like casting pearls before swine

SEPEDI
Translation:  o se ke wa lekeletša pheta pele ga kolobe
Proverb: letšema la bitšwa le a tloga

XITSONGA
Translation:  u nga veki ndzalama emahlweni ka tinguluve
Proverb: u nga teki xinkwa u nyika tinghala

TSHIVENḒA
Translation:  u songo posa nungu dzau phanḓa ha nguluvhe
Proverb: u songo posa nungu dzau phanḓa ha nguluvhe