Here are a few possibilities:
1. On your (as in "on your behalf"):
* Vir jou - This is the most common and literal translation. It means "for you".
2. On your (as in "on your back"):
* Op jou - This translates to "on you" and is used for physical placement.
3. On your (as in "on your own"):
* Op jou eie - This means "on your own".
4. On your (as in "on your way"):
* Op pad - This literally means "on the way", but conveys the meaning of "on your way".
5. On your (as in "on your account"):
* Op jou rekening - This means "on your account".
Please provide more context, and I can give you a more precise translation.