[Editing Language] Changing the text of the red ‘Ask Question’ button

I’ve seen this question asked before but I still haven’t found a solution.

I heard that to change the ‘Ask Question’ button, you would simply go into the Anspress plugin folder, then you’d go into the languages folder, find the .po file, edit it, and you’re done.

BUT, the problem is that I don’t have an English .po file to edit. I see a bunch of different languages but no English.

What should I do?

Edit: Screenshot of what I tried