The logic, and procedure, is fundamentally still the same as discussed in
this thread. You will need to invest quite some effort to adapt everything to the Paperwhite, but go ahead if you want to!
PS: CollectionsManager is not a reader app
Anyway, you can use the russian localization by renaming its section name to "en" (instead of "ru") - this way, the english strings will be replaced by the russian ones.