You can't teach an old dog new tricks
m̩bwa m̩zee hafundiʃwi mbinu m̩pja
In Swahili Mbwa mzee hafundishwi mbinu mpya.
This idiom is a direct translation and is commonly used in Swahili culture.
Example
"Habadiliki, mbwa mzee hafundishwi mbinu mpya."
