ibab

Thank you.

I didn’t find the inc/template-tags.php, but through the themes includes/functions folder I found another comments.php that included the sentence I wanted to translate.

So this has been solved.

How did you even change the language? I made .po and .mo files of the .pot file but can’t seem to find anywhere a setting that would affect to the language file that is being used.

But I think your issue is just generally charset related. Is your WordPress installation in Polish or English? If it’s English, you need to probably change the charset to something else. Not sure where you can do this though.