Hej, dude to help you out.
Download Poedit and download and open with it default.po which is in your wp-content/themes/woopress/language.You have everything there, every word used in the theme, just search for these strings that you need.
Then save the file, it will also automatically create 2 files .po and .mo which you both just overwrite in your theme folder(the path above).
The same works for translating plugins just the path is wp-content/languages/plugins.
Hope that helps…