Where to translate theme's frontend text?

Yes the theme comes with a po and mo file.

You can google or use poedit like software to edit the po file of the theme and change them.

Easier way is to download the theme and to search in between the .php files for those text and translate them.

Hope this answered your question.

Thank you for your answer. I’ll translate the theme with the po file.

As I’ve never translated a WordPress theme, what do I have to translate, besides the word Published, in here, not to break any code?

Published <span class=\"entry-date\"><time class=\"entry-date\" datetime=\"%1$s\">%2$s</time></span> at <a href=\"%3$s\">%4$s × %5$s</a> in <a href=\"%6$s\" rel=\"gallery\">%7$s</a>

Okay, I finished translating the theme with POEdit Pro, but besides the question in my last post above, I wonder how to translate the last 7 items that have square brackets, because they don’t appear in POEdits “Translation” box like they are shown in “Sourcetext”:

e.g.: ← [ Previous post link ]

It appears in “Translation box” as:
←

but in “sourcetext box” this way:
← [ Previous post link ]

Is it necessary to manually add “[ Previous post link ]” (with square brackets) for this example into the translation box as well?

To complete the translation another question is necessary to be answered:
I cannot find “Read More” that shows up, when an URL is entered in Slider images URL field. This was my initial reason to translate it ??
Could you please point me where this can be found to be translated? Are you going to include “Read More” into the .po file so that I can translate it the right way as well? Thank you.