That's already fixed, the %1 was a part of the default English translation.
Idk if I uploaded the new version.
As for the list I'm aware I could have done better, but for now it's going to be zero or two extra columns.
I'll make it so the player list appears normal when on servers without the mod.
edit: new version with Danish translation and %1 fix added
I can't really add the player list changes until I get home, I can only test server side stuff right now.