The "Lunchbox (午餐盒)" Office Background in Options has been wrongly translated into "Launch Box (啟動方塊)" in the Chinese (Traditional) localized Office since version 2013. The translation still has not been corrected in Office 365 and 2019.
https://support.office.com/article/add-an-office-background-9cc36278-caf3-48a3-8a20-660c4e14f61b