The original font set for Peter pan image have no support for the Cyrillic aphabet.

But thanks to @hecha71 and @oktus i can now provide a very good font as replacement.

Download the .zip file and exctract it's contense.

Then upload with ftp to folder /usr/share/fonts and replace the original font files.

Restart Enigma2 and now you should be able and use Cyrillic languages.