From what I understand, there's a problem with those files: they don't keep the same space between columns.
Two of them use 7 spaces, while the other one uses a tab.
That's probably why the formating gets messed up.
I recommend you first replace every tab with a space (any text editor with search+replace should do this pretty easily), and then try to merge them. That should get you better results.
As for the language.. Maybe each txt has its own encoding. If they do, good editors (I use vim
, but if you're not used to it, don't bother with learning
), should be able to save all of the files in utf-8, which would solve that problem too.