In your instructions “Setting up a Multilingual Website with the Polylang Plugin” it is said:
“Note: You should also translate the theme to your other languages. You can find a guide for that in this article. Please note that .po/.mo files should be created manually for each language.”
That surprised me. I am not sure: Do I have to do that or will it work even without translating the theme maybe? If not: Why do I have to translate the theme as well?
Maybe it would be helpful for future users like me to explain that shortly furthermore within these instructions.