Thread:Support/How to get a source language (English) .po file?

I'm currently experimenting with programs that evaluate .po files. It would however be necessary to have English .po files for comparisons between languages. Requesting one the usual way produces an error screen. I've not investigated yet, but assume, redirecting the export source internally from MediaWiki:*/en to MediaWiki:* could already be it? Are there any obstacles that you just happen to know? Thank you.