Where can I replace the message "HR_LOA_EMP_NOT_ENTITLED" in Absence SSHR?

HR_LOA_EMP_NOT_ENTITLED has current message text of "This absence will decrease the employee's PTO net entitlement to less than zero for one or more of their accrual plans."

Users have been inquiring what PTO means. How can I replace it with a custom message? Is it something I can do through personalization?

Thank you.