@Joni How exactly is your USB stick formatted? 98 SE does not accept all formats edit: It should also be a USB 2.0 stick (USB 3 sticks usually do not work)
Perhaps if you need a localized CPL or dll or exe, doing it yourself is pretty straightforward, especially in w98 where there arent any problems with signatures and alike. Just open the file with a good resource editor, like restorator 2018, and change the strings.