fonts-config shows error and firefox corrupted after copying windows fonts

I copied windows fonts (windows/fonts) to /usr/share/fonts/truetype and then did

akash@akash:~> su -c "fonts-config --verbose"
Password: 
Creating fonts.{scale,dir} files .........................................................................
Creating cache files for fontconfig ......................................................................................
Rereading the font databases in the current font path ...
Generating java font setup ...
  warning: cannot find a Simplified Chinese sans font, Simplified Chinese might not work in Java
  warning: cannot find a Simplified Chinese serif font, Simplified Chinese might not work in Java
  warning: cannot find a Traditional Chinese sans font, Traditional Chinese might not work in Java
  warning: cannot find a Traditional Chinese serif font, Traditional Chinese might not work in Java

What is error. Also after this my firefox has corrupted. Not a single text is displayed in firefox. What can I do?
On my system #1

Any other method to install fonts on opensuse

this is a bug with some win8 fonts, the bug is with some of the fonts themselves no way to fix it, just remove the fonts and rerun fonts-config

ps. for a single user setup you can copy your fonts in the .fonts dir in your home, kde has a nice gui for installing fonts too see System Settings/Font Installer

you can read this thread for more info
https://forums.opensuse.org/showthread.php/503684-My-fonts-are-completely-broken-HELP!!?highlight=fonts

Ok my firefox is up and running but still I get the error

akash@akash:~> su -c "fonts-config --verbose"
Password: 
Creating fonts.{scale,dir} files .........................................................................
Creating cache files for fontconfig ......................................................................................
Rereading the font databases in the current font path ...
Generating java font setup ...
  warning: cannot find a Simplified Chinese sans font, Simplified Chinese might not work in Java
  warning: cannot find a Simplified Chinese serif font, Simplified Chinese might not work in Java
  warning: cannot find a Traditional Chinese sans font, Traditional Chinese might not work in Java
  warning: cannot find a Traditional Chinese serif font, Traditional Chinese might not work in Java

that’s not an error it’s a warning that you don’t have Chinese fonts, if you’re not a Chinese user you can ignore it, if you need CJK fonts get some free fonts from here
https://software.opensuse.org/package/cjkfonts
or you can search google for Chinese font
https://www.google.com/search?q=Chinese+font