Soft Rejected - Language issue

Hi guys,
I got soft rejected. How to fix this issue. Please help me!

The localization file should be in English and delivered as .POT file. .POT will contain all translation strings. .POT file name should match the themes-slug. Theme can include an actual translation files, but it should not add the en_US.mo or en_US.po because English already implies.

Here’s some tips: developer.wordpress.org/themes/functionality/localization/
Do a search as “Generate PO files WordPress”