Thank you very much for the detailed response. Now I use LANG=en_US.UTF8 instead LANG=С, and everything works fine. The problem really is related to the system locale, Zim works absolutely correctly.
Thank you very much for the detailed response. Now I use LANG=en_US.UTF8 instead LANG=С, and everything works fine. The problem really is related to the system locale, Zim works absolutely correctly.