From the request ID: 849279

##1-5 - always show the Russian language even if I switch the language, re-cache the skin, re-cache all (system).

2. These are caused by the same issue as your other tickets, log entries are recorded in the current language and will always be displayed in that language. Existing log entries cannot be changed when you change languages.

Many thanks,
Alan.

In addition the following as also need to be language abstracted and should be translatable through the language strings:

Is this possible to translate the System Settings tabs and titles of the fields inside any topic of the System Settings?

Hello,
That is not currently possible I'm afraid. If you would like to see better support for translations in a future version then please post in the Community Suite Feedback forum.
Many thanks,
Alan.

In addition the following as also need to be language abstracted and should be translatable through the language strings:

Tools & Settings > Logs > Scheduler Logs