Background of the issue:
I have set Russian as the default language for my site, which is currently under development (and in maintenance mode).
I expected to see all posts and pages lists in the backend to display first in Russian, with the two plus symbol for my 2 other languages, but it's not the case.
Symptoms:
The post and pages lists are still displayed in French (formely default language), and Russian is proposed as a translation. I thought it would be the other way round as I set Russian as my main language.
Questions:
Did I miss something in order to set Russian as the default language?