Maybe you are facing the same problem as me. When I copy something from PDF to Word then the characters with punctuation are represented by two characters where the second one is separated punctuation. It makes problem for checkspelling, printing, ...
I have created simple workflow to copy UTF-8 NFC normalized text to clipboard. The text can be pasted into Word as expected.
I suggest to use Ctrl-Alt-Cmd-C shortcut for the workflow...
The workflow also handles translation of the wrong representation of the character "ž" and "Ž" into the correct one (for czech language).
Usage:
select a text in PDF
press the shortcut (for ex. Ctrl-Alt-Cmd-C)
switch to Word
press Cmd-V
Enjoy.