The Zim Database Language Customizer utility displays and enables editing the contents of the zimlang.zim customization file for the selected Zim database.
Click on the cell in the Current Value column along the row corresponding to the language customization item you wish to change
Type in the new value for the language customization item. The updated value will appear in bold. Click on Save to store the new language customization file
The Zim language customization changes for the selected database have been accepted and will take effect as soon as Zim Server restarts.