Now we see your files has different encoding, nobody knows anything about your
files content.

It's up to you to solve your problem - settings code page in command window, fix
your files before merging, change code page to one common, ...

Again, Merging 10 000+ different files isn't job for text editor, but for some
file merging tool.

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<https://forum.pspad.com/read.php?2,73834,73843>
PSPad freeware editor https://www.pspad.com

Odpovedet emailem