Translation on Arras theme

Hello.
I’m using Arras theme, but my site is on macedonian language and there are phrases which can’t be traslated from editor. I need help how to translate phrases in single.php …
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By <author> Published <date>
Posted in: <category>
Tags: <tags>
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I edit those phrases from language/default.po , but still are on english. Thanks in advance.

edit:
Problem solved.