don't like English/another language/English/another language. It is difficult to read.

Yeah, that's just unacceptable.

Side by side is good too 👍... anything that does not break the flow.

I think that if a community stresses in all their publication that their team reads and speaks English only, and still grants the opportunity for authors to include their native language, then going the extra mile to make the English section the priority is common sense and courtesy... but that's just how my brain works:)