XnView Software

I am on version 0.98.1

XnViewMP-win-x64.exe /loadinf="XnViewMPcz.inf" /verysilent, where the inf contains
[Setup]
Lang=cz
Dir=C:\Program Files\XnViewMP
Group=XnViewMP
NoIcons=0
Tasks=desktopicon

Ignores the language setting and installs the default english.

the language setup is different than the language program

What do you mean?
Oh, wait, I thought the language you select is what the program will use. That sucks.
Is it possible to add this then?

Sorry but there is no way, you can create a default xnview.ini with language