Porblem translating a theme

Hello,

I’m using Anime Star theme and I’m trying to make it translated into arabic (and there is no .po file as indicated in description…).
So I tried to generate the .po file using Poedit, but I’m facing the following error:

warning: header field ‘Language’ missing in header

And I can’t get all the used words in the theme. Any help please?

Thank you!