If I got it right, you game doesn't use Cirno font. Check if you have Cirno.ttf file in the root of the game. If it's not here (but I guess it's there) download it somewhere (or I can attach it) and put it there. If it's there, try to install this font in your system - usually you just need to copy that file into C:\Windows\Fonts (or something like that). If it still doesn't work... well, if it doesn't - tell about it.