Latin extended fonts doesn't work…

Hello everyone, I am using hueman longer then year and I am really happy with it, thank you developers.. But I have got one problem, no one of the fonts in /theme options/styling, does work with latin special fonts like “š” “č” etc.. I have no idea what is wrong , can you guys help me please? Here is the link with screenshot, showing the problem : http://postimg.org/image/o4iovba7r/ you can see, the special characters are in bold and not displaying correctly. Here is link to live site, if it can help you : http://www.dronmania.cz/novinky/drony-zachranuji-zivoty/

Thank you very much for any help Lybior